People need to look at more than just the score. I took two 800 io players, a tank and a dps, into 11 WM and we timed it. I picked them over others because they had timed a 10 WM, so I knew they knew the dungeon. And get this, the tank was from Ragnaros! Who woulda thought?
Raider io is useful past the magic number and too useful not to use.
I’ll make that exception specifically for tanks. If you have a 100 io on a tank from timing one dungeon on +10 with these affixes, you know what you’re doing.
Dps can get carried above their own capabilities as long as they aren’t face pulling unnecessary packs, by higher dps dealing more damage and interrupting important stuff. Healers can get carried by people avoiding bad, using defensives, and killing things fast.
Tanks are almost impossible to carry even on easy weeks.
Improperly dealing with sanguine or necrotic, not using class specific tank cds, underpacing the timer because of not knowing a good pulling strategy, all cause fails in a group that could otherwise succeed.
I don’t think raider io is the only issue, your ilvl is meh and you play a warrior which doesn’t bring any particularly great utility to an m+ grp
on how many of my chars kiddo, i already have 4 with 3 more all neck and neck to 120 
Ingrish much?
My friend, I realize that it is disappointing to get declined to groups (I spent most of the weekend getting declined while trying to improve my score) but I have realized that it is the closest thing to progression that we have. I had my io profile open and realized that I needed to get better scores with 3 dungeons, and it gave me something obvious to do.
I just got my first 10 on time this season last week, but last season I learned once you get to the 10+ key’s people know what to do.
Especially when you only invite people that had did a +10 in the dungeon before. Below 10, pugging brings out some of the worst players I have seen
At least on alliance currently, if you do 10s in an group (but not necessarily in time), you’ll probably struggle to get accepted into 7s. It’s just how it is shrug and you’ll have to run your key, and if it’s not a desirable key, you’re probably not going to get too many people interested.
Even if you’re playing a meta class with an ilvl over 400 it can be problematic. My only advice is to run your own key.
This is such a myopic way to think about it. Metrics are used like this everyday. SAT scores and college…you dont score over a certain number you get rejected and those who score over get accepted. That’s a hard line number used almost in the same fashion and io is. Score under 1000 and you probably won’t even get into your state school you’re a resident in.
I’m around 1350 or 1450 I play a rogue and I get constantly decline for 12 or 11 the problem is not io the problem is for every 500 dps is one tank so that tank guy want success so he will push with the best io people he can find.
Two posts I’ve made in this thread about the fact that when you make a group for M+ the list of dps applying can be 50 ppl long…They hate io but hw exactly should we pick people from that list so that they don’t feel the need to come here and post about it? I mean do they really even think they have the highest ilvl on that list 99% of the time? There are 410ilvl+ ppl everywhere already.
I will say that I quite often see custom groups with requirements such as 20k+ DPS or 405+ gear score to get into something super simple requiring no real knowledge or experience. 20k dps is like the top 40 players on my realm 
So you get a score even if you don’t use the addon?
You have a compound problem.
So, overall… Yeah, you are going to have a difficult time getting in groups.
I see threads like this and I’m so glad I don’t participate in Mythic+ runs. I don’t really enjoy speed runs. Stuff like this gives me flashbacks of Gearscore. haha
Thankfully, I’ve never felt like there is any reason to have to do M+ since you can get gear from other means. It’s a good time to be a casual scrub!
If you look in the OW lfg (although its kind of dead now), people always require a public profile. People with hidden profiles are instantly declined. People like to be assured the player will perform to the standards they are looking for and will seek as much information as possible. Hidden IO = no invite.
The scores are derived from the Blizzard leader boards in this very site. You’re times get posted automatically by Blizzard and io just gathers that info and has scores attached with times which it feeds to the addons in game menu.
The very nature of M+ is this scoring system, whether you call it the completed time or the raider io score, your name is ranked on a list. Because that is how the whole thing was intended to be used with the mythic dungeon invitational. M+ is competitive by design. It was a replacement for challenge modes.
If people dont like being scored, they are barking up the io tree while the entire leader board forest sits behind it…
JFC this is like trying to get car insurance. And this is why I said to hell with this infantile garbage.