If I could just flip a light switch and just immediately go to sleep and wake up a solid 8 hours later, I'd be so happy
So would I. Since I don't fall asleep easily, managing my sleep schedule is incredibly annoying. "I have to wake up earlier than usual tomorrow so I'll just go to bed early." Nope, I can't do that. What I have to do if, say, I have to wake up at 6 a.m. on Wednesday (I've been waking up at more like 8), is go to bed on time Monday night as usual, but wake up at 6 on Tuesday on short rest, spend all of Tuesday with little energy, and then and only then will I be tired enough to go to bed "on time" that night to wake up at 6 on Wednesday and get enough sleep Tuesday night.
It works, but it'll screw up my Tuesday.