That's not right at all. While I'm sure there are plenty of studios who could handle Baldur's Gate 3, Larian is absolutely one of them. By giving them feedback on how unfun their 5E changes are, we stand to convince them to change them. Advantage is a powerful mechanic in 5E and they surely will see that their house rules are handing it out too easily, among other things.
You know, I absolutely DO think that Larian has the skill, creativity, budget and manpower to make a great Badlur's Gate 3. And I used to think people were being absolutely unfair to them when they claimed that as the creators of DOS 2 they weren't suited for the job.
But I'm starting to notice a trend here that has little relation with what they could do and shows something else: they aren't even trying.
There's so much they could easily address to quell all the background noise about this game "being more DOS 3 than BG3", but at this point it's starting to feel like they just don't give a shit and have way too much confidence that "We can put as much DOS as we want here and everyone will love it anyway".
The control scheme has my personal crusade for the last month; the arbitrary limitation of the party size is another thing they borrowed from their own franchise rather than from the originals; the leveled areas and enemies in a system/ruleset that never used to mark its enemies and monsters with explicit levels in other games is another DOS-borrowed feature; about the mountain of small arbitrary tweaking to the rules they made people already wrote hundreds of pages...
I don't even think I need to go on to stress the point: the issue here isn't if they can or not. It's that they just don't want to.