It's perfectly fine to have content you're extremely unlikely to see. If you get it, you have a single opportunity to explore beyond your means. One single opportunity, with which you're almost certainly not going to be able to do everything and so will have to pick and choose what you actually want to use it for. If you're intentionally aiming for the good luck, of course the rates will feel ridiculously low - because you're not supposed to be intentionally aiming for it, instead just immediately pivoting your run the moment you hit the good luck. In the end, you're not going to be able to achieve much without repeated runs that get far enough to be able to actually experiment with things. (Or at least that's the obvious idea of the game design. Whether they manage to pull that off is up to how well they can actually design the game's challenges.)
Similarly, if you get unlucky on something that has a high chance, then you got unlucky and that's that. You can pivot and try one of the other options you still have open, or just treat it as a run for grinding comprehension instead.
(I don't treat savescumming for RNG as something that needs to be worth considering in balance. You're obviously not supposed to do it since if you were they wouldn't include the RNG in the first place.) (6% isn't even that low of a chance. Are you not doing like 15 runs just to learn all the actions on the map anyway??)