Why is it bad that people can't just get high all the time!?

because people's personal affairs should be their business as long as they don't bring harm to others

Just watch. I f marijuana becomes legal, there will be a lot more problems in America.

I'm neither American, nor your teacher but here; http://www.collective-evolution.com/2014/09/13/7-ways-marijuana-legalization-has-already-benefited-colorado-in-only-8-months/
Drug prohibition is more problematic than decriminalisation.

If you're not american, then why are you bitching about america and "because capitalism" all the time? Just saying...