Not disagreeing with you overall, but I just wanted to add a bit of nuance to things you've mentioned. > Anecdotally, there are people who smoke weed every day

Not disagreeing with you overall, but I just wanted to add a bit of nuance to things you've mentioned. > Anecdotally, there are people who smoke weed every day and still sleep well at night. First, as far as I know, smoking weed would only affect your sleep if you consumed it a couple of hours or so before sleep (exact numbers vary per person, but you get the idea). If someone consumed some weed during lunch, I would expect theit nighttime sleep to be pretty much unaffected. Second, what do you mean by "sleep well"? They might fall asleep faster and stay asleep throughout the night. But how good was their sleep quality in reality? We are talking in terms of measuring REM cycle length and such. From anecdotal experience, I also thought that my sleep shortly after consuming was "good", as I would fall asleep easier. However, I can confirm that it wasn't high quality sleep at all for me, my REM cycle was very short, and I definitely noticed extra groginess after waking up (along with the rest of the things mentioned in sibling comments, like lack of dreams and such). Doing some more A/B testing on my sleep in regards to consumption of weed pretty much made it clear that it makes my sleep quality worse, but makes it easier to fall asleep.