I do buy from GOG. It's my primary online store. I only go to the others when something isn't available there. Which is most of the time, because we live in the lamest dystopia.
For what it's worth, fanboys are gonna fanboy, but I have no need to deny Steam's conveniences to call them out on the anti-property DRM crap. Absolutely piecemeal DRM is worse. Not that Steam made it disappear, I had a game install Denuvo on me over Steam just this week.
Absolutely digitally purchasing games is better than digging up optical media for DRM checks. Absolutely it's better to have worldwide digital launches where you just... get the game the second it launches instead of running around after it like a crazy person.
But we do live in a DRM dystopia where we own nothing and are supposed to like it, the tens of thousands of dollars dumped into my Steam account will go away the moment a Steam moderator decides they don't like me and they will certainly evaporate after I'm gone, and many, many games are now lost media like we just started making TV but haven't invented video tapes yet.
All those things get to be true at the same time. I was kinda joking with my original post just to remind people that Steam was far from controversial and beloved at launch, but since we're talking about it... yeah, hell yeah, we gave up on basic ownership for the sake of convenience and Steam was absolutely part of that process.