How could any rule or law have stopped him? 91.155, 91.13, and 91.129, were already broken during the flight to name a few. Most of the videos/discussions start with the pilot being over the airport in the clouds. But if we rewind back a little, there was a point at which he made the conscious choice to enter them and continue flying in them. He was very very far behind the airplane (and quite likely wasn't even adequately familiar with available systems). If he waited a few hundred more hours and built experience flying local in a skyhawk and continuing his education, he would have at least known how to talk to the tower, seek help, and been less distracted with the mechanics of flying and been able to dedicate more attention to the EMERGENCY and treated it as one rather than brushing it off as "not wanting to get stuck."