Perhaps it's over principled, I know I'm an insignificant spec in the market. However I cannot tolerate the idea of them obtaining monetary support from me - because then i'd be complicit in their immoral behaviour.
What would be wonderful is if the M1 was an effort independent of Apple. But the capitalist world is moving in a direction of more merging and vertical integration which makes it difficult to vote with your money when it gets redistributed into one enormous corporation... so the only remaining option is to not vote.
Additionally, being seen with Apple hardware supports Apple's legitimacy.