Earlier quoted context omitted.
Like every other system since UEFI came out a decade ago. Do you use a Librem phone/laptop yourself?
Most other manufacturers aren't in the business of pushing their own OS.
What would concern me is if we see a big revenue stream from their software. Then i'd question them not wanting Linux on their machines.
But imo you already gave them what they want when you buy an M1. I don't see a reason why they care beyond that.