For me, drugs were:
- socialization. I met a lot of friends through alcohol & drugs and they became the social glue for my circle. Alcohol & drugs became a large part of my identity.
- a way to cope with boredom. Every day is a party when you're high.
- identity. In my generation, drugs were mostly cool and associated with iconoclasts, artists, etc.
Young people's culture changed. I don't think kids see alcohol, drugs and being out of control as cool anymore. I don't know specifically what changed this. Better social messaging, mass prescribing of ADHD meds, more competitive job markets.. Social media and multiplayer gaming have both ramped up competitive drives for what used to be more relaxing activities. Maybe the current optiate and meth epidemics are more effective as a warning than, say, the crack epidemic was for us?
Kids have tech to glue them together(poorly in many cases, but it does fill the niche). Kids have internet subcultures to define their cultures now. Alternative lifestyles are much more accessible and take much less risk to participate in vs my childhood in the 80s. You don't need drugs to meet people or forge common identities.
Kids are never bored anymore. I suspect there has never been a better time to be a kid in a boring small town. If you have bandwidth, you have culture. You have better shipping, home delivery, cheap imports, etc. Affluence seems more common than it used to be, even in our highly divided economy.