Why is weed looked so poorly on.

My parents recently found out I smoke and they think I’m the biggest bum in the world now. It’s started ruining my highs because I just feel guilty every time I do it. Everytime I’m high now I’m just really hard on myself and I feel ashamed. I tried to tell them you can smoke and still be productive because I am. They tell me “I’m sure the people addicted to drugs on the side of the street also thought they had their life together while they were on it too.” And I didn’t really have an answer so does anything have anything to say about this. I truly felt weed was helping me because I was for the most part doing all my tasks for the day first then smoking to just chill but now my highs are super anxious so idk what to do.