Add ons like Hekili that tells you which spell to use next to maximize your DPS in Mythic+ or Raiding, etc…
Do you consider that cheating? Players that don’t use Hekili practice and have to figure out which spell to use to achieve maximum damage on-the-fly vs. People that use Hekili or MaxDPS that just shows you which button to press.
The person is still crippled by having to read the ever changing (sometimes is swaps to st to mt or a proc happens to change action priority) optimal spell queue. If anything it is just a set of really sturdy training wheels to get people into the flow of how a spec should perform and said flow is only as good as the coding.
Besides most people having that will hyper focus on the spell schedule and neglect to be more observant of the encounter and thus likely do something to lead to their death.
So boring is what it is. But I don’t like carrying a bunch of DPS that can’t do damage so I support the addon
No,not really ,they do help but they can mess up also so there is that. I tried it once but it just didn’t work for my rotation.
No not really… because people that follow scripted buttons will never be able to maximize their output or utility (depending on spec)… Not like a player who really understands their class.
Do people still need rotation helpers? This isn’t MOP anymore.
Ironically the best thing I found to help with spell priority was just to level a new character of that spec. Yeah it requires more work but it easies you into the class by gradually introducing the synergies and rank upgrades. Especially now with SL spell progression.
And then on the flipside back in legion the other way I learned was just jumping into mage tower with 910-930ish ilvl on specs and then hitting my head plus reading all spells.
Trying to follow instructions from someone or replicate priority from like hekili just never helped me
Same it takes time and it changes from one expansion to the other requiring to learn them all over again.grumbles.
What does the video have to do with your question?
I use Hekili.
The limitation of the addon is that it can’t think it can only take into account what it currently sees not what is going to happen.
Example: Boss takes 400,000% increased damage in the next 30 seconds
Hekili: Pop your CDs now!
If you’re an idiot, Hekili may be a detriment to you 
Actually, what I did prior to having Hekili was have a WeakAura with the CD status of all my abilities and I just used what I knew to use when it was supposed to be used.
Those addons are detrimental to playing well. You need to be able to adapt on the fly better than an addon with a few conditionals does.
If it was a sure-fire way to follow a script and get 100% optimal DPS, it might be a little more questionable, but it’s not. It TRIES to give you a best case suggestion and is almost never perfect.
It’s only beneficial for bad players IMO.
combat addons are definitely cheating, the devs have taken them into account so much that people without combat addons cant really do dungeons unless they memorize the fight like a choreographic dance.
That’s like the worst part with the change per expansion. Like just the resource spent change is enough to throw peoples rhythm off. I was trying to do tanking on warrior after last trying in legion and I am like wtf why can’t I use IP. Turns out just requires 2x the amount of rage when I last remembered using it. Plus I remember the shield slam/revenge play being more free to use revenge. Instead of now and waiting for free proc.
Also I wasn’t happy with the addition of HP for holy/prot.
It tells you the optimal rotation but that isn’t the optimal one for what you are doing. It is just doing a priority check but without having an idea of what you are actually doing. For example it will have you blow major cool down just before a boss fight.
Oh and to answer the question
Do you consider that cheating
Blizz says it’s ok then it’s ok 
My definition of cheating is always exactly the same as the game makers because that’s the only one that matters.
If tomorrow Blizz says full on botting is ok then it’s ok.
Kek nothing better than using steroid cd and then being assigned for pairing/soak. Something players need to gauge when playing. Whole thing from start to end is like chess, can’t fixate on one piece gotta macroview.
I use a MaxDPS add on to help me with my newer characters. I don’t think it’s cheating because it doesn’t press the buttons for me, it just highlights them sometimes. This add on has helped me learn my rotation so well that I can now perform effective DPS on this character without it. I haven’t had the add on updated on my hunter in over a few years, and I played my rogue for the first time in a long time yesterday and realized I needed the add on to help me increase my damage. I still didn’t go update it but I may look into it.
If the add on is not playing the game for you, or performing the spell, I don’t think it’s cheating. If they become banned, I’ll delete them, but I don’t think they are.
I used an addon in Legion that helped me get used to playing other classes I’d never played before. It was kind of like a simplified weak auras, that told me what was off cooldown. Now I don’t play those anymore. Are you happy?
I don’t consider it cheating at all.
I use it because my brain gets foggy sometimes and makes it hard to keep track of my rotation
I don’t either.
It’s not like it presses the buttons for you. It just tells you what it thinks you should press next.
The situation or your foggy brain might still cause you to press something else.