I suspect it has to do with Microsoft wanting to lock down PC hardware (again) in a similar fashion as mobile hardware to their own benefit so they’re being aggressive with trying to get that ball rolling by forcing people to do it their way, both with hardware (TPM, secure boot, higher system spec requirements for AI) and with software (forcing a Microsoft account over a local account, default encrypting the system and uploading the keys, etc).

They’ve probably calculated this move and are prepared to lose a chunk of their users to Linux.