I do not know if people really believe in the theory that Messi is kinda running the club and pulling all the strings.
Is he involved in the whole "Lucho is in trouble, he might get sacked etc. saga"? Sure, Leo is part of the squad (the most important player) and there seems to be a big problem between the team and the coach. But he is not even close to a position to decide or have a major influence on actual decisions that are made by the board.
Leo was also always a guy who played the way his coaches wanted him to play. He played different roles for different managers and we can assume that he followed their orders. Take Tata for example. Leo was instructed to play kind of a classic 9 in many games which is a role that clearly limited his abilities. But he still made the runs and everything instead of doing his own thing.
Is Messi more powerful than your "average" player? Probably. Does make decisions over coaches and stuff? Hell no.
Edit: That is why I hate all this gossip bullshit. Instead of talking about football people who probably do not even watch the majority of games come out with their weird theories.
What was the last time there was a serious discussion in the Messi thread anyway? All we have in here is: He is past it, he is a dictator, he is the GOAT (after he scores), he is lazy and should run more (after he does not score) and comparisons to Ronaldo out of nowhere.