Earlier quoted context omitted.
Ironic that you find that the frequently actuated button is the prime source of failure but refuse to adopt the newer models that require no button actuation, no?
The home button wasn’t removed until iPhone X, prior to that your only option was to replace the phone with another or subsequent model with the same button. I assume the whole reason Apple removed the button was because the economics of replacing the main board over a two cent button didn’t work out - even when the people bought warranties. (Applecare) It was successful, I’ve not had a unit failed because I kept pre…
Also in your previous comment you stated it required a completely new main board to fix but that is false. It did require complete disassembly, but the button was replaceable.