Theories for why Win11 has shall we say 'unusual' official system requirements (opens in new tab)

And by 'unusual' I mean the "processor must be ~2018 or later", TPM and secure boot. My theories are: 1 - Microsoft was throwing a bone to OEMs after offering Win10 for 'older PCs' for free which would no doubt have cut into their bottom line a bit. 2 - Microsoft has a massive crush on Apple...