I recently requested those rights again because I needed to install something new for a PoC I was working on, and that wasn't allowed anymore. But during onboarding I had those rights and installed homebrew to more easily install dev tools, and homebrew keeps its admin rights to install stuff in a directory owned by admin. So that circumvents this whole security model (and I did, for my PoC).
The problem is that it's all or nothing. Homebrew should have the right only to install in a specific directory. Apps shouldn't automatically get access to potentially sensitive data. Mobile OSs handle that sort of thing more granularly. Desktop OSs should too.
Because the overly restrictive security rules at my work are little more than security theatre when it's so easy to circumvent.