I assume you understand basic economics in a capitalist system, supply vs demand, etc, so I'll interpret your first question as "why isn't it banned," which goes to your second question:

Sure, "we" can ban it, Ohio and the US are still nominally representative democracies, it just requires you and millions of others (people or dollars will work) to make your representatives care enough to enact legislation.

This is generally when ennui sets in and people move on to the next thing in their feed.