LSO,
Who's to say the doctor/dentist working on you or your family had enough rest? They aren't regulated and they can kill you too.
Also, not all commuting is equal. I normally used to commute from Vegas to Honolulu the day before when our 767s flew the route. Now we use an A330 that has crew rest beds and I take the red eye the night before that departs at 0130. I sleep in a sound proof compartment in a bed for 5+30 of a 6+00 flight, arrive in HNL at 0530, I'm asleep in my condo by 0630, and I'm back at the airport between 1100 and 1400 to fly. I am plenty rested.
Similarly, not all rest is equal even if you don't commute. I know plenty of pilots that are up all day doing household chores, running errands, taking care of their kids, surfing, etc. who then show up to fly all night. Even as a commuter when I did not have the crew rest bed and slept in an economy class seat, I was often more rested then the non-commuter I was flying with. How do you regulate this? If you think the commuter needs regulated, the non-commuter rest needs it too.
I did many night Navy flights with my pilots tired. They may not have been at work but they sure weren't just at home lying in bed. Same situation as I see at the airlines. Should the Navy start doing bed checks?
The bottom line is that you can not regulate rest other than by the time limits. We are professionals and we are expected to prepare ourselves properly for our flights. There are methods within our individual companies and pilot groups of monitoring and correcting those pilots who can't do it for themselves. I do not think the problem is any worse at an airline then I saw in the Navy, we just get the headlines
You can't regulate everything especially common sense. Outside of the required hours free of airline duty, pilot rest is common sense.