Time. No studio has unlimited time and resources. Decisions have to be made to exclude some things in order to produce a product that appeals to a large audience at a reasonable time.
So yes some 0.1% of the population will be disappointed their pet customization is not included but hopefully the entirety of the game is good enough they will buy the game regardless. This isn’t an all or nothing choice.
It doesn't work like that with RPG genre, because the point is having choice, the less choice you have the worse the game objectively is, like I already said before, having a choice that you won't take makes the choice that you will take worth more.
And you’re not understanding what I am saying. Choices are fine if there are resources for it. But not everyone is going to get everything. That’s an impossibility, an objective impossibility.
If Larian wants to have bearded females and it’s in the budget then sure. But if it means taking away from what Larian considers more critical? Then no it won’t happen. They will assess if catering to the specific 0.1% is worthwhile.
I’d love to have custom companions with deep stories and voice acting. But I can’t. I mean more choices are good right? I’m sure there’s more than 0.1% of the players who’d want this. It’s not always just about choices. It’s about how many choices can a studio fulfill while having realistic goals.
This happens in every business.