Human use "better than safe sorry" and "common sense" statistics, not "A causes B".

When an airplane crashes, people avoid air travel because "better safe than sorry". Yet air travel is the safest form of travel (much safer than cars) and one plane crashing doesn't change that. However, people feel safer driving.

Similarly, people think real RNG is unfair. If they flip a coin once and don't get heads, it's ok. Twice and they start getting unhappy. 5 times and they believe the system is unfair because of "common sense" ... when actually 5 tails in a row is reasonable.

One way to handle this is to make systems that aren't random, but instead cater to people's poor grasp on causality. If you flip a coin once and don't get heads, increase the chance of getting heads by 50% (so 50/50 first time, 75/25 next time, 87.5/12.5, etc). Do that each time until the person wins. They will believe the result is random and feel it was fair because they won.