True RNG produces frustrating streaks
True random number generation means every roll is independent. Flip a coin 10 times, you might get HHHHHHTTTTT (six heads, then six tails). Mathematically fair, psychologically brutal. In combat, true RNG can produce a critical hit streak that one-shots you, or a drought where you miss six times in a row. Players experience this as unfair even when the probabilities are honest. This is why professional games often abandon true RNG for a smoother alternative.
Pseudo-random distribution evens the variance
Pseudo-random distribution (PRD) guarantees that if your critical strike chance is 20%, you will get a crit within every 5 attacks on average, with no droughts longer than 10 or streaks longer than 3. PRD requires tracking internal state (how many actions since the last crit), but it creates more predictable feel and less frustration. RPGs like Dota 2 use PRD for crits and dodges; roguelikes often use true RNG for replayability and surprise. Neither is objectively better, but PRD makes combat feel fairer, which matters more than actual fairness in single-player games.