[precompute]

Hand sizes differ a lot, and finger mobility does too. Also, the length of the ring finger is different for different people. So yeah, there's a definite requirement for different keyboards for different people. And it's not a "meme" or a trope, it does make a huge difference. Plus, it depends on the layout you use (or are hoping to build) and the work that you do with your keyboard, and the kinds of features you're using (tap dance, macros, expansion, combos, etc) and how many of them you can remember. Sure, you can go with a bog-standard split and it'll be MUCH better than a regular QWERTY. But if your needs dictate a better keyboard, it doesn't mean you're hyperoptimizing.