So pace while you where hand bombing the airplane in the bumps while programming the STAR and talking to ATC what would you have done if the master caution light had illuminated ?
Just because I can do something, and yes I could hand fly the scenario you described to a safe landing, doesn't necessarily mean it is a good idea.....
Part of being a good pilot is managing risk. I had a friend who talked a lot like you, until he splattered himself all over a mountain side when his ego wrote a cheque his ability could not cash.......