There are debates which are illuminating (esp. when you first time hear some ideas), you get new POVs and see excitement in the speaker's eyes, and even numbers/data might add up to a point, but the overall ideas might be harmful/dangerous/impractical/too-nuanced/in-theory-sure-but
Examples:
- People should believe in god(s) b/c people believing in god(s) are more stress-resistant and are overall happier -> improvement of life quality
- Everyone should pay the same amount of taxes - since they get from the state on avg the same amount of services -> fairness
- Everyone should be paid the same for any kind of job if they put the same amount of effort/time -> fairness
- Geopolitics can be described in a few catchy phrases (esp. in hindsight) - zero-sum games, rimland/heartland etc.
- Richer and more achieved should have more kids (by law or consensus) than poorer ones -> it'll improve human gene-pool wrt cognitive capabilities
People formulating and believing (and sometimes acting on) such and similar ideas are not rare. Having them as family, friends, colleagues, random interlocutors at a party and entertaining their train of thought, sure. But considering them as a partner in a company, advisor, someone you elect for public office... not so much.