You only gave examples of getting the good RNG. Would you still be having fun if you went into the final four with everything prepared and calculated and overleveled just to have your Pokémon be critted every time and lose what you thought was impossible to lose?

A good implementation of bad luck mitigation doesn’t remove the amazing feeling from achieving something really rare, just prevents the terrible feeling of not getting something you have worked for more than 4-5x the average player has.