The answer is simple, Larian owes their big success with BG3 entirely to bear sex, not story, world building (although the name Baldurs Gate helped) or characters. You can see this for example in the first threads that sprung up on this board after the announcement were about asking for more sex.
So to repeat the BG3 success as Larian stated they want to they have to add more sex and they added those scenes to the trailer to ensure their fans that they will porn it up more.
This must be a delusional or purposely misleading take (I think the latter given the general attitude of your average post), EA numbers speak for themselves, more than 2.5m copies sold, there were black screens for sex scenes in EA. If story and world building were objectively worthless then no amount of marketing wizardry would save the game from fail. Success factors in a lot of variables and blatantly stating that it stems from a single marketing decision or even one aspect of the game is wrong. I would appreciate if you'd save your bile for topics that are worth of it. Also the majority of threads are not sex related.
Instead of your personal attacks you can look back at the whole development and marketing process objectivly.
The EA attracted a lot of rpg players because of the name BG. But the outsized success of it only came when it spread beyond the usual RP gamers. And how did it do that? With the bear sex scene which was a big headline in all media and attracted the attention of a lot of additional customers. And Larian was aware of that. You can see it all over the game that sex was an important part of the game design. All companions are attractive and playersexual, they made a lot of changes to appease the thirsting masses like making Halsin into a sex obsessed companion and changing around kisses in the limited post game support they were willing to give in order to appease the thirsting fanfiction part of the community.
And if you are honest, BG3 does not offer a lot besides that. The plot is full of holes, thanks to the last minute rewrites, the companions are flat because of the sex focus and making them all waifu, its full of very annoying mechanics like trading and the toilet chain and it was verry buggy.
What made everyone try out the game anyway was the bear sex scene and character nudity. Everyone knows that, including Larian which is why they added sex to the reveal trailer as Larian is fully aware that people expect a lot of nudity and sex from their next game (again, see what the very first threads that were created here were) and that they will be very disappointed if Divinity does not at least match and better exceed the sex and nudity in BG3. This is what became Larians trademark.
