A lot of people use it for escapism, which is fine if it's controlled & it's not done compulsively aka you're not high all day. I guess that goes for pretty much anything...when ppl do drugs to avoid/put a bandaid on tackling issues they have (eg. anxiety, depression etc.) it's problematic, since they're just piling on to the problem.
There are plenty of "good" people who do the latter, they're just uninformed, undisciplined or both. The former aren't doing anything harmful or "bad".
Then there are people who do it help them directly deal w/ a physical or mental. There's definitely a medicinal value in pot. It goes beyond "getting high" for a lot of people. I don't smoke a whole lot, but it helps me get to sleep & sleep well, which is something I normally need to take prescribed medicine to be able to do.