> Sample bias: I feel that so many subtleties are lost because people don't generally realize that their observations/anecdotes/experiences are biased.

This one is so odd to me. There's plenty of logical errors and shortcuts the brain takes that I had to learn to consciously think around, but the idea that my experience isn't necessarily representative of the entire world was something that was blindingly obvious when I was literally a child. I'm still taken aback for a second when I see people say things like "most of the people I know do X" or even "everyone in my family has Y", without giving any thought to whether their sample even approaches representativeness.