If you recall, one has to be a certain age before they can buy cigarettes and lottery tickets.
The situation is really quite clear: by consenting to government power enforcing some people's morality, you have opened the door for
other people to use the same power to different ends. Simply put, you feel everything is fine so long as government is regulating activities in which you're not engaged. But sooner or later, the folks in power will get around to telling YOU what you cannot do, for YOUR OWN good.
When that day comes, hopefully you will understand who enabled it.