This here is one reason why I'd vouch that the Steam playerbase has a slight demographic difference from the rest of the PC playerbase. I don't play on my PC via Steam and I usually only play one game at a time, period. I am not constantly being tempted by other video games. If I do get a new release, it's going to be on my PS5, and I'll disappear for a few weeks to play it before returning to FFXIV. (I still need to finish out achievements in Rebirth.)
People who play on Steam are likely using that platform because they like a variety of different video games. Not that non-steam players don't like a variety of games, but there's a big reason I never bothered even making a Steam account. I'm not tempted by sales for games I don't intend to play.