You don’t have to use the cli. But it’s nice to have the option if you want to.

Create one command "iownyou" that does tbe following: Change the owner of every file on the computer to the default user and make every file readable, writeable, an executable by anyone or anything on the computer. It may not be secure, but on the bright side, you'll never have permission issues again!

This isn't all that different from using CMD on windows. Except that it works better, obviously.