No one who hacks expects the manufacturer to help or even agree.
I'm sympathetic to farmers who hack their John Deere tractors which they only use on private land. I'm much less sympathetic to people who hack the software of cars they drive on public roads.
All my 7 cars are hacked. Sorry you feel that way.
Wasn’t DFU reflash always available? Was there any example of Apple blocking a device from receiving updates or reinstalls? As far as I recall updates were not even authorised until a few years ago.