Things in RPGs that you used to like but don’t anymore

[Morty]

How often do people actually know the real world probability distribution of something that is being handled by a given dice-based game mechanic?

Real world stuff? Mostly the normal distribution. That's why it's called "normal". Nice pretty bell curve too.

To be clear, what I meant in that post was that I don't think a game of dice and numbers is likely to accurately model the statistical likelihood of something happening, so trying to do that is not a very realistic goal. In the sense that it's probably not going to succeed anyway.