On and off daily marijuana user.
I don't feel "dopey and less intelligent" when I smoke weed at all times of the day. It actually has very little impact on me. But it does help me deal with my chronic anxiety issues.
I take breaks regularly. Sometimes I get into a place where I can't operate in my day to day life because of intrusive thoughts. When I smoke I'm able to break out of cycles of repetitive thought and make real progress in my life. I achieve so much more and get so much more out of life. I'm able to engage with the people in my life better and improve my relationships.
You speak with false authority on a matter you cannot possibly understand, because you do not share the life experience of myself or people like me. It's irresponsible and you should desist. If you have relevant experiences, share them and explain that this is your conclusion. If you don't have relevant experiences, don't include yourself in the conversation. Don't speak in generalizations about other people's lives.