This is exactly why. If you are doing linux maintenance, this is really helpful because you can tell if you should be running a specific command as root or user

This is exactly why. If you are doing linux maintenance, this is really helpful because you can tell if you should be running a specific command as root or user. If you are just giving instructions on what to do for a normal user, omitting it is probably fine. If you are doing something that will require both, it might be good to explain it at the beginning of your instructions.