I've had constant insomnia since I was probably 8. I only sleep 4 - 5 hours a night. I feel rested typically and energetic mentally, but physically it would flair up my allergies, eczema, etc. When I moved to california, it was the first time in my life I consistently was getting 6 - 8 hours of sleep.
During that time, I held a full-time job, was promoted to tech lead, delivered a major project, and was working on a side business. I honestly think it helped me achieve those things to the extent it helped me sleep.
Then this year I moved to a new state (where it isn't legal). I stopped smoking without any side effects, had a kid, and now I am sleeping 4 - 6 hours again. Allergies are bad, eczema, etc. and I'd love to start smoking or eating it again; as it definitely helped. However, here we are where it's not legal, and I'm trying to abide by the societal rules (even if I disagree).
Often, society doesn't really know what's best.