Jto, the two are linked.
Figure*2 : Fatigue, alcohol and performance impairment : Nature
it's pretty obvious whether you are pissed or not, your performance, decision making and levels of complacency due to anticipated fatigue levels, well known about and due to lack of aircrew, fatigue are going to be at dangerous levels for a fair few of our routine tasks.
As for the new regs, I fully support them. If you can't operate in or around an aircraft without having had the self restraint to not drink, or the integrity to fess up, you don't deserve to work in aviation.