Im gonna give my 2 cents here
I live in the Netherlands so yea, smoking weed isnt anything strange over here at all. I used to smoke more, nowadays I smoke about 1-2blunts a week if that. I fucking hate cigarettes but I like weed and I dont think there is anything wrong with it eventhough Im an amateur bodybuilder.
Why? Because it reminds me to relax. In modern society we are so busy and hectic with rushing from point A to point B, meetings, appointments, continious information overload due to the internet, social media. All we do is react to stimuli. Smoking helps me relax and reminds me that its okay to do 'nothing' every now and then. So yes, the physiological effects are negative, but in my opinion, if you keep it under control, the psychological relaxing effects of decreasing stress outweigh the negative consequences tenfold.