It's not supporting "the tiny fraction of people who can do repairs". It's supporting everyone who might choose to take it to a third party instead of Apple when it breaks -- be it for better price, better service, or even to force Apple to be competitive on both fronts. Hell, it's even supporting the very idea of fixable devices, as this arguably impacts not only post-sale support, but also the very design of said devices.

It's not black and white, we don't need to go full cyberpunk wild west to establish some level of control over our electronics.