Sure does. But it beats literally zero sleep. Day after day. Or dangerous stuff like some of the prescription meds. I’ve found a timing that gets me to sleep but I dream plenty.

I wonder if that's why I felt unbelievably more tired the next morning after I smoked or something before bed,

This is true, although sporadic "single-dose" use will allow enough rem sleep towards the end of your sleep cycle.

Heavy use leaves enough of an after effect to supress rem almost entirely, which is partly why it causes issues with long-term memory