I said elsewhere, I hope this is just some way to track changes over time per user.
But they need to take an anonymous hash of some non changing data or create an install id that is used for this and nothing else (e.g it identifies a unique user but not the person or hardware behind the user).
Too much identifying info is just pushed around like we shouldn’t care, it’s become a real problem.
These days with UEFI it’s much less likely to break things. Worse case though you just boot from a LIVE USB boot, chroot in and rerun grub/your bootloader installer. Often even if windows puts its own bootloader first, you can choose your bootloader from the bios boot menu and just rerun the bootloader installer.
It used to be a lot worse.