I was using high potency edibles everyday for months while severely depressed.
I know people get addicted, may abuse cannabis. I myself used so heavily due to severe depression, it helped me a lot. I would be able to engage with the world a again, draw, laugh, spend time with friends. Otherwise I'd just be vacant, empty, distressed. Honestly, it was the only way I could write my coursework, or read papers or textbooks. I guess it turned off the part of my brain that was heavy and anxious.
Then when I started antidepressants, it turned into smoking socially every week or so. I think it's because as my depression went to moderate, weed was no longer beneficial to me in terms of mood, sociability, cognitive ability which is what I was using to improve it.