There are plenty of people who customize their KBs for aesthetics first and plenty who focus on function/feel. And I think the number of people who focus on exclusively one side is almost non-existent.
Sure, there's a lot of people who talk about the thock or clack of this key or that, but for some it's all about the feel to their hands or the comfort of typing on a particular type of KB.
I've suffered from RSI in my pinky and ring fingers for over a decade now. If I spend too long (greater than 2-3 hrs) typing on a standard 104-style keyboard or laptop KB, the pain flares up. If I don't desist within a day or two, I start loosing grip and arm strength, to the point where I was unable to hold onto coffee cups or soup cans.
For a long time, I used the Microsoft Natural 4000 [0], a split membrane KB. I probably bought about 10 of them over a 5yr period, and I think I still have 3 in the closet.
But moving to a split mechanical was like going from sleeping on the floor to sleeping on a cloud. I could adjust the tenting and angle perfectly for my body, so it feels natural to me. I was able to try out a half-dozen key switches 'til I landed on one that was quiet but still gave a lot of tactile feedback on switch activation.
So yeah, there's definitely a bunch of aesthetic mumbo-jumbo that most people don't care about, but there's a lot in there that's not just thock & clack.