Actually, in the Netherlands which has had de facto legalization for several decades, consumption rates are lower than in many other jurisdictions. This has been widely reported for many years.

As far as I can tell, anyone of any age who wants to smoke pot already does. Legalisation will remove criminal penalties that never made any sense to begin with, bring a good part of the market above ground (and it could be all or most of it if it was done in a sensible fashion), and free up police resources for actual crime.

Not that you or your ilk care about the facts.