This is exactly why the new collusion "rule" which is more of a blanket, and generic policy is a very bad thing in it's current implementation.
There is no definition of collusion that can be applied by a TO to make a decision and have it be supported by a ruling. Instead it becomes TO versus community because the TO (in this case the streamer) has no ability to back up their decision or support their decision, this leaves it to be the TO/Streamers opinion vs whomever opposes their opinion.
For this rule to be an enforceable policy, one which doesn't result in negative outcome, it needs much more definition and some strict guidelines for both the players and the TOs.
It may even require players to register their teams/characters going into the tournament in order to validate whether or not they are going off "script".
Further, I firmly believe that these decisions need to be made after the fact and made with a comity/board instead of by a single individual in order to allow for reasonable decision making that is not liable to be influenced by an individuals immediate emotional state.
This is a really good point. I think having an actual set of guidelines for what is and isn't colluding would be more helpful then dropping the hammer on something that could be argued either way.
Even in this situation, there's a lot of "If you think it was *whatever the opposite side of here*, you're a(n) *insert insult towards intelligence and mental comprehension skills here*", when that's a myopic way to look about it and is NOT how any rule in a tournament setting should be carried out.
Although on argument does seem to be "it has nothing to do with character selection", but then you realize colluding was being called in this instance at the character select screen (sure, they played for a few seconds, but I think that was to see if they were gonna button check or if they were gonna try to play out the match). So in actuality, character selection does become a big part in it since most instances of people crying out "COLLUSION!!!", do so based almost entirely off of character selection.
I just think that the idea of judging "if someone is taking something seriously" or not is also just a dicey thing to make a rule on in most instances.
Again, I get why colluding/collusion isn't a good thing for the FGC as a whole, but the way the rule is set in place is just really sketchy to me.