You don't have a requirement to have an email account to login to Windows. MS is pushing it hard, (deceptive trend in big software) but the user can still push back.
I don't know if its still true today, but last time I setup a macOS machine (2020), it didn't require, but pushed, an Apple ID. My Pixel phone I setup this February also didn't require, but pushed, a Google account. I think iOS did require an AppleID, though.
macOS doesn't require Apple ID, although you wouldn't be able to use the app store without it (but pretty much everything worth installing is available as direct downloads anyway). This is similar to the current state of affairs with Win11, except that the latter very aggressively pushes you to use your online email/password as Windows login, whereas macOS insists on having a local account even if you do also set up Apple ID.
