Don't be naive. Ready availability and social (and legal) acceptance of the drug is going to create new users. Primarily among young people who are already desirous of peer acceptance.
Many people will switch from other habits and intoxicants to pot, so yes there will be new pot users.
The silver lining of the pot smoke cloud is that it makes America’s problem more obvious. When life seems to get so unbearable and pointless that one’s chief desire is to drown one’s sorrows in pot, something that is in some ways less acutely harmful than alcohol, it will now become obvious.
I hope it will become more obvious that people need to be high, but high on God. God will also make you do things that the world says are stupid. God will make you generous when the world says you should fight those who grab things from you. God will make you love people who have treated you ugly, and yet not in an unhealthy way that makes you dependent upon them. God will take the unnecessary self-caused stress out of your life. In fact, God gives every good thing that could plausibly be ascribed to pot smoking, but without the stupor.
Maybe you should parent better and stop blaming everyone else for your kids doing pot.