Does macOS have namespaces? Can you modify the kernel? An equivalent to Linux Security Modules? ConfigFS? FunctionFS? I haven't used it in decades so genuinely asking.

If I remember correctly you have to do some funny business to change things in the root directory too?

They're completely different operating systems, there will of course be differences. In my experience Linux definitely gave more freedom to do whatever you wanted though. It'd be a bit disingenuous to argue otherwise. They serve different purposes, and that's ok.

But oof repairing things on those logic boards... Everything soldered on makes the hardware a nightmare. I swore off Mac after trying to get one repaired. Had to trash the whole logic board and lose everything. I think that design is almost criminal tbh.