How is marijuana smoking viewed in the us?

My husband has been accusing me of drinking and of substance abuse-I’m not and offered to test. However, he is a heavy heavy pot smoker. I don’t think weed is bad or anything, but he is a corporate executive who got a big ticket last year for having weed. He says weed is harmless, which although I agree I wonder if his place of work would be that relaxed. I feel like he is being sort of a hypocrite here because it seems like his contract would expect him to be drug free. Or is marijuana considered an okay thing here?