You are fighting a strawman. No one said that gadgets are the only thing that matters. Most people who had hand/arm issues and use ergo keyboards will tell you to: go to a doctor first, then get a good chair and desk, do regular exercises, and maybe then get an ergo keyboard.

I have been in the MoErgo Discord for a while. When someone new comes in looking to buy a keyboard because they have wrist/hand/arm pains, the first advise consistently: go see a doctor.