And the other problem... Having faith that people will do "the right thing?" People often don't, especially when it comes to even slightly complex things. Homeopathic remedies are a massive industry, but they've been definitively shown over and over to have no discernible effect. Religious cults still flourish in every civilized nation, despite their policy of taking everything from their members and leaving them as broken, one-dimensional caricatures. Chemical and drug abuse (as opposed to recreational use) is rampant, and our laws cannot differentiate between the two. People even deny proven science because they don't like the implications, stifling scientific progress that could help sick and dying people.
It's not a new dilemma, but it's getting more complex and urgent as our population grows. On the one hand, some people make the world better. On the other? Some people make it worse, sometimes simply through their ignorance. Distinguishing between them and giving the helpers the latitude to improve without giving the destructive forces latitude to destroy is the fundamental dilemma of any society.