You can play a lot of PvE games without competition. Deep rock galactic, space engineers, Minecraft mods, left 4 dead, divinity original sin (or baldurs gate 3 these days).
I think there’s AoE and starcraft co-op these days.
You can also okay grand strategy games in a peace with players war with cpu only game.
They didn’t manage, they’ve just offer good enough for you not to care. In case of movies or series you care because they are a lot more limited