The logic was just that when UNIX was originally evolving, they ran out of disk space on their PDP-11 and had to start moving less-essential binaries to a different disk. That’s why it’s “/usr/” which was originally for user data but that disk happened to have free space.
Any other explanation is just retcon. Some distros try to simplify things.
People: Specifically add “site:reddit” to their searches to avoid slop and get real human responses
Reddit: Replaces the real human responses with slop
How can Spez be so clueless