This requirement just does not make sense to me. Why would Microsoft even have this requirement? Do they want to force users into an account so it is easier to lead them into Office packages? It can't be for greater data profiles on users since they could do this in other less explicit ways. Microsoft just doesn't have the ecosystem like Apple to make this worthwhile from their point of view or the users.
Microsoft ships Bitlocker with every OS and given the TPM requirements one can speculate that it will be turned on by default on every Windows 11 computer.
I've seen an increase of tech support posts where people boot up their computer after an update or motherboard change and they're asked for Bitlocker decryption keys and they don't know what those are. Their data is lost forever. Their computers are bricked.
The experience of working in IT and modding online tech communities has taught me that computer literacy is very poor even among those who use computers every day. They're just appliances to most people. And this is OK. The problem is that the people who can't figure out what a right click does will never figure out how to back up their full disk encryption keys or even what they are.
Forcing a Microsoft account on Home SKUs eliminates this problem.