Romances have become one of the number 1 cringe "features" in RPGs anyways (imagine if a party member betraying you rather than luvin' you had become a "feature" requested and you get an idea why it's become so shallow -- it's nothing surprising anymore, plus it's something to be ticked off a list, which both is the polar opposite of character depth).
There's a lot to say about how romances play out in RPGs too. The formula of gradually leveling up companions, unlocking ever more dialogue and eventually, as the "big price", pardon me, banging them, has always been juvenile to the max. But then that's probably the gaming industry for you, which is comparably still in its infancy.
I'm not holding my breath that BG3 is going to stop that trend in the slightest. (Which is is fine, I'm then just going to ignore all that stuff.)
Interesting take. Am I to understand that you believe that it should be a case of "Hey, we just met, let's bang"? While I have had that happen out here in the real world, it's usually more "leveling up the companion" by doing things like, you know, dating. Wine and dine, dinner and a movie, you know, those things we do out here because we can't go crawling through a dungeon collecting loot, or flying around the galaxy, opposing x threat, or creating it... I find it odd that the video game version of dating would seem juvenile.