I doubt prohibition for the entire country would work anywhere near as well.
The only way to truely enforce a prohibition is within a police state with severe punishments i.e. death/life sentencing, and even then you won’t stop all people from altering thier consciousness.
Inmates in prison can still get high if they have the right connections.
Prohibition just doesn’t work.
Abortion is WAY more damaging and sinful then smoking dope or watching porn, nobody has died from either but abortion kills every person it’s performed upon.