There’s not a whole lot of good options for decent ARM PCs and the M1s are legitimately pretty good machines, repairability aside.
Even if you can’t repair them at least it’s pretty much guaranteed they can at least have their OS upgraded to a libre one. There’s going to be millions of them on the used market in a few years for cheap.
I have zero complaints about the hardware of my work provided MacBook Pro, very nice machine to use overall.
Are they the best bang for the buck? No. But Linux isn’t just about getting as much as possible for as little money as possible. Not everyone wants to daily drive an old bulky ThinkPad because it’s free-er. I’m happy with my framework but the battery life, keyboard and touchpad are quite inferior compared to my work MacBook. I wouldn’t buy one for myself, but I can recognize it’s still a nice machine and it’s much better than whatever crap Microsoft is pushing out with its Surface line.