As others have said it’s so the user can place their own executables on the PATH. Ubuntu supports this too, if you look in ~/.profile you will find this snippet

# set PATH so it includes user's private bin if it exists
if [ -d "$HOME/bin" ] ; then
    PATH="$HOME/bin:$PATH"
fi

I believe the current convention is to use ~/.local/bin for this purpose, and ~/bin is an older convention.

they’re OpenSuSsy
I’m sorry