It's ridiculous but pretty normal. It's the fuck you got mine mentality ''Steam is too crowded, they should close the doors, but not for me tho'', ''I'm all-in with a hand-curated store as long as the store picks my games and fuck the others''.This probably means Epic rejected this game, which makes it even more ridiculous that the developer is so vocal in defending Epic.
I for one welcome the future where only our corporate overlord chooses what game can we buy next, that will make the backlog problem way easier.