Comment by bigyabai

The Mac is barely a UNIX system to begin with. It doesn't ship with UNIX compliance out-of-the-box, and nobody complains. You're likely the minority here.

If Apple locked Homebrew behind SIP or some other inconvenience, it would just result in more virtualization. The default Mac environment hasn't followed industry standards for more than a decade, most professionals are doing their work in a VM already. Truth be told, even Apple wants you to stop compiling software locally in the long-run: https://developer.apple.com/xcode-cloud/