I'm not sure I would describe an LSD high as having mental clarity... trying to solve simple problems while on LSD can be very hard. There is a lot of clarity after the high though - the next several days.
Depends how you define 'biggest time stealers' - tv and video games are huge time stealers for many people. And the fact that drugs have a chemical effect on the brain does not mean they are necessarily worse than, say, watching some braindead tv show while stuffing your face with fast food, or sitting in a classroom for hours listening to a monotone voice regurgitate some dull bullshit you don't care about. Many people have had beneficial experiences with drugs, for example Steve Jobs with LSD.
> Cannabis, like any recreational drug, steals the most precious resource we have: our time.
Everything 'steals time'... watching TV, reading books, listening to music, working a job, etc.
> Life is the best teacher and recreational drugs are how you forfeit that precious, amazing, education.
Not at all. It really depends on which drugs, how you use them, etc.
> You don't have to go far to see this in action. Think of someone who is a habitual drug user and ask yourself 'are they emotionally mature?'. They aren't. They are taking an escape. Recreational drugs are antithetical to emotional growth.
I've met plenty of people who regularly use recreational drugs and who seemed wise, calm and content.
> I wasted 20 years of my life 'partying' even on a casual basis.
Cannabis is not really a party drug.
There are vast differences between various 'recreational drugs'. It's how you use them that matters.