Here’s my source. It’s the latter case, they use digital sales figures from the companies that provide them.
You raise a good point: if Larian aren’t sharing sales figures then it’s not possible to definitively compare them. I don’t think the 22M figure is very credible (as the other commenter said it doesn’t match up with the data we do have regarding player count/copies sold, and came completions) but even 5-7M copies sold sounds like it would place BG3 on the list. There’s enough bleakness in the gaming scene as it is, so I’m glad to hear it might not be quite as bleak as I thought.
Oh absolutely! I’ve heard the term “power gamer” used to describe people who love building the perfect, 100% optimal character that is multiclassed just so with such and such items, who can do X amount of damage per round, and so on. I think some people use that as a derogatory term but I don’t see it that way. It’s just how some people like to play, just as some people like to play characters who are this race with this color hair and an elaborate backstory, stats be damned.
There are absolutely people out there like what you’re asking for. Lots of combat, exploration, puzzles, and roleplay is restricted to basic narration (“my character asks where the bad guy is” “ok, roll persuasion”). They have a presence online as well, for example r/3d6 on Reddit, but it’s a bit smaller/less vocal than the RP folks I think.