Yes, its obvious that he hasn't written a lot of production code. Again, so what?. That's not in any way an early warning that he isn't capable of teaching basic programming skills to others.
exactly. if the viewers of these videos intend to become serious software developers then they can just correct whatever wrong shit they learn. if they don't care about best practices then it is still better that they know how to do the basics to automate mundane tasks then not know any at all.