In college during the 80’s I found myself and many others using alcohol, MJ, or both. I decided to stick with one and continue to limit the other.
One is harmless and not physically addictive except for a short-term lowering of IQ ~10 pts (yes, agreed some can not afford to add to their stupidity) while the other is highly addictive to some, kills all living cells that it comes in contact with, and severely lowers IQ and autonomy to the point of total loss of bodily control and memory.
Marijuana is very addictive. I have family members struggling with it. Not only that, Wake And Bake is very common with users. The two Martini lunch has been replaced by the Bong Rip Breakfast.