It sounds like you believe those in power are more astute or intelligent than those they exercise power over. I disagree. I don't think there is a positive correlation between a person's ability to impose their preferences on others and the quality of their preferences. If anything, I would guess there may be a negative correlation, considering the kind of person who is likely to become a successful politician. Thoughtfulness and intellectual rigor is not exactly reward in politics.

I would also bet that those who are the most interested in imposing their preferences on others probably are way less likely to listen to or attempt to understand different perspectives, leading to not even understand the views and practices they seek to ban.