Depending on TOD, the drone's reaction time probably wouldn't have mattered. From what I understand, he was taking sleeping pills because he had a bad chest cold and couldn't sleep. Accidental overdose on sleeping pills + difficulty breathing = asphyxiation, and if he was taking sleeping pills it means he likely wasn't expecting company for several hours, which is a long time given your brain dies within 10 minutes with no oxygen.
But yeah, it's still baffling why she called someone other than 911 three times before actually summoning an ambulance. Mind boggling.
Personally, I try to go out of my way to learn how to do certain things so I can be more self sufficient, and so I'm not caught like a deer in the headlights. First aid classes, independent research, provisions for self defense or emergencies, etc. A lot of my peers couldn't give a rats ass, though, and can't be bothered. They figure they'll always be able to pay someone else to do it for them, so they don't bother to learn. And if it doesn't effect them directly or they believe it will never effect them directly, its not even on the radar.