To put this in slightly different context, why don't we each state how inclusion (or disinclusion) of sex scenes would affect our OWN video game purchasing decisions. I'll start...
I have no moral objection to sex in video games, but I think that it is distracting and often badly done. I play games on a system with dual monitors, so if I **really** want to see sex while I am in the middle of a video game I can just look it up on the other monitor and have it fit my personal preferences with a much finer degree of control than in a video game.
That being said, including sex in a video game would not prevent me from buying it, as long as the rest of the game systems appeal to me. If the rest of the game is borderline then "includes real sex (lol)" would push me towards not buying, but it would by no means be a primary motive for the decision.
Regarding BG3, most of us have already purchased... I am critical of some of the video game aspects of the game, but there is enough here that I would buy again IN SPITE of the sex.
So, is there anybody here would would refuse to buy if they removed the sex? What about refuse to buy (if they could remake that decision) because of the sex? My personal guess is that the sex (or lack of it) is not really the most salient feature for most people in actually deciding how to spend their video game money, but I'd be happy to hear arguments to the contrary.
Sex is not most important element ofc, but in fact game rating depends not only on sex scene. Also, romance can become a most important element for someone. That's why, even if you watch sex on a second monitor, it won't be quite the same experience. People are attracted to romance itself, relationship with character and reaction of other characters to this relationship, not sex cutscene .