Ok, let's not delude ourselves thinking anything we say here has any bearing on the development of a future RPG with the budget and scope of BG3. Anyone who decides to participate here is autistically screeching into the void one way or another. With that said I'm still gonna be shitting on the writing because that's my opinion and go fuck yourself.
It probably has *some* bearing, it just depends on the subject. Devs read Codex, just as they read Reddit and Resetera, and generally as a dev you want to cater to as many people as possible. Sure, no one will remove trannies from the game and piss off a milion redditors just to satisfy some small niche, culture war topics are mostly pointless to discuss, but if you're a dev and see thousands autists on an RPG forums complain about some issue like the tactician being too easy, you might as well throw them some uber-tactician difficulty setting in the next game, since it doesn't cost you much and doesn't piss anyone, etc. Also even if the effect on AAA RPGs is small, majority of RPGs still come from the indie scene, and these games are often heavily impacted by what devs read on some niche internet forum, so any discussion might have an effect on the scene as a whole. If you don't like trannies in BG3, it's probably worth saying it, just so other smaller devs know that there is still a niche interested in non-trannyfied games.