Personally I never understood why file managers in linux refuse to do operations that require privileges. Guess what, if I have Nautilus open and want to move files into, let’s say, /usr/local, I don’t want to have to switch to the terminal to do so if I already have the stuff copied within nautilus. On Windows, I just get an admin password prompt if I try to do naughty stuff. On Linux, we have the whole polkit system, but no file manager seems to ever use it. Tbf, this is not a nautilus problem, as no file manager seems to do this.