It's not just a random player, it's a player whose red card was contested even by the commentators as it was playing out. You should just watch the replay:
https://www.youtube.com/watch?v=MuaS3jUAark.
"Does he endanger the safety of his opponent? You could argue it does, but I think it's slightly unfair because it's more of a stepping action that lacks force and intensity to create that red card."
"Is it the right call? I don't think it's the right call...I don't like that being the level that we're calling for a red card. I think that's a yellow card, I don't see that as a red"
After the match, there was continued debate as to whether it should have been a red. Messi didn't get a red card for a nearly identical incident.
FIFA has a rule to handle this sort of situation, and it's Article 27. In my opinion, that is a poor system as any process that's initiated by FIFA is bound to be arbitrary. It would be better to have a universal appeals process, and such a process might very well have resulted in an overturning of the red card nevertheless. Either way, the outcome was correct, even if the path to getting there was flawed.
And just taking a step back and taking stock of what we are arguing here; it's not as though Belgium were given a disadvantage, it is simply that they were being asked to play against the full squad. It was pathetic to complain about that, especially given that Belgium comfortably thrashed the USA's full squad.
As spectators of any sport, that's all we can hope for: take the best of 2 teams and pit them against each other. See where the chips fall. I don't actually enjoy watching an easy fixture, I want it to be a nail biter.
Belgium should have either said nothing, or just said "cool we don't care, we'll beat them either way, game on". Instead, they (and most Europeans) came across as sissies.
Looking ahead, for me personally, I'm hoping football comes home.