To be fair I'm a Vim user and so hjkl feels natural to me. I just also have to hold my right thumb down.

Not sure how others do it, but on standard keyboards I've always struggled with accurately moving my hands; for example one journey to the arrow cluster and back meant my right hand usually landed on the wrong row or column if I wasn't looking. All issues of that kind just disappeared when I started using a keyboard actually designed for human hands and reduced hand/wrist movement.

But the reason custom keyboards exist is exactly because different people want different things, and that's fine.