It's maybe not for everyone to be able to reason and discuss things with an open mindset.
Sometimes the only real option without falling into chaos is a belief system that, although not always based on reason and facts, provides enough certainty to cope with the challenges of life.
Changing someone's mind doesn't always fall in the category 'do-able' or 'in the zone of things I can control'.
I often find myself avoiding certain topics, especially with family, since that won't bring anyone closer in any way.
RE: Is Bill Gates Thanos?