[A CA Guy]

I do think that most people pick up drug habits while young and stupid. So it would think the older one gets without illegal drugs, the less likely they ever would use them .

Just common sense I think.

The older they get, the more grown up/experienced in their head they get to make wiser choices.

[A CA Guy]

So it would think = So I would think

[monkeyshine]

Mostly I was joking but yeah, I think you are right for the reason you stated and also because younger people who use drugs for "escapism" don't learn sober ways to deal with their problems, they may just turn to drugs, and so they defer their own maturation in the process. It's probably the same with alcohol, though.