Quite true.
While tournamnet/organised play is the minority of xwing play it is as you say the only type they can control and also the most visual/prominent.
While I can see *potentially* this being a problem/tactic in 1 in 100 organised play games i dont think i'd ever see anyone do this in games in my social group.
Tourny play can be a great advert for the game and its aspirational for many players but its important to remember the vast majority of players are playing on the kitchen table with family and friends.