The developers state that they allow one tricking but do not encourage it and urge against it believing it goes against the design of the game.
They also say that their decisions for not implementing hero bans have nothing to do with one tricks and the further changes will most likely not consider them.
So for the record:
One tricking is allowed
Blizzards urges against it
Believes it causes meta issues
Goes against the games design
I wouldn’t consider that saying blizzard supports one tricking
It would be a bad business decision to tell customers that they can’t only play one thing. The developers can’t control the player base even if it’s going against their desired design. So they have to tolerate it but they don’t need to support it and will advise against it because they believe it’s not the right way
They don’t like having 1 tricks, but still feel wrong to punish players who enjoy 1 tricking. So he is begging us to not 1 tricking in nicest way possible
Some heroes are designed to do certain things - for example, moira is designed to hit fast moving targets. If you pick a fast moving characters into her, you’ll have trouble. That’s where your problem comes - you’re stuck, you only play 1 character and you’re being countered, what do you do?
Mostly, you let down your team and play into something that’ll smash you.
Because some heroes are countered harder than others. If you have a Torb or Sym one-trick on your team all the enemy has to do is play heroes like Pharah or Hanzo and if you don’t have anyone else on your team that can play something to take them out, you’re boned, all because one person thinks that their desire to play a single hero is more important than the needs of their team. Some one-tricks are better than others though, depending on the meta. Like nobody is really going to complain if you one-trick Orisa right now, but should the meta shift away from her, you’re gonna get more complaints.
Because what makes a good overwatch player is someone who can analyze a situation and switch to the best hero for that situation. You just need to be aware of your counters and people who refuse to switch off a hero when they’re getting hard countered by multiple heroes on the enemy team, are doing nothing but feeding.