Ah so you want the windows 98 experience, root access by default all the time without passwords or extra prompts.

Maybe setting auto login and sudo without password can be almost enough? https://askubuntu.com/questions/147241/execute-sudo-without-password

I agree that there should be an easy setting to at least allow updates without password. I installed Manjaro for my mom, after a while she complained "there are updates every day and I need to input the password too many times"