While this is all true, it doesn't obviously counter the GP's contention. It's a good argument as to why YouTube's cut isn't the same as Patreon's, but that doesn't mean that 45% isn't to high.
Considering Youtube probably doesn't break even ( Alphabet don't list YouTube expenses separately, only revenues, which is suspicious), and the vast majority of content on YouTube is thoroughly unmarketable and unprofitable ( think vacation videos, school lessons, etc.), maybe, maybe not?