[aspaceman]

It expects /usr/local/bin/ to be on the $PATH, and so it adds itself to that location.

It doesn't know if you purposely meant to remove it's install location from the PATH, so it doesn't re-add it.

It could do what you ask, but this requires setting the $PATH. The most common way to do so is modifying bashrc, but now you're modifying the user's bashrc. Now you ask, is the user using bash? Maybe you're using the fancy whiz-bang ohmyzsh since that's what Medium told you to do, and now that doesn't work either.

If you keep /usr/local/bin on your $PATH (which is standard in most 'nix installations) then you don't have to change anything or do anything. Why do _you_ have such an abnormal system? We can play this game all day and it's fucking miserable. Just learn how to use your tools for fuck's sake.