> what if I'm out with friends, drunk, high, on the side of a mountain

You can plan around it, assuming a reasonable oncall schedule. If its every other week, yeah screw that. If its a week out of 4, you can plan it and still have it better than virtually every other highly paid profession there is, and many low pay ones.

> My hours are 9-5, after that is entirely me time

Then maybe an hourly job is better than a salaried one... Of course, if you're not paid the part, it's not worth it. But if you're paid 150, 200k or more? I hope you're not expecting 9-5.