Comment by nsv

To add: when you install software yourself you choose this, when your install software from e.g. a distribution package it is chosen by the package maintainers, and to a larger extent the maintainers of the distribution.

This is one of the big advantages of using a pre-made advantages of using a ready-made Linux distribution: beyond the convenience of having an installer or easy to install packages, you get some assurance that the system as a whole has been thoughtfully put together.

Arch Linux for example symlinks /bin and /sbin to /usr/bin and /lib to /usr/lib among other things.