it means what whatever scores you have on your primary attributes, if someone has 5 in his resist skill he'll reduce your % to hit to sh**. Even if you hit 200% to hit you end up with only 50% with your final chance to apply the status (-75%).
For a game that says itself to be a tactic one, it would be quite random... even punishing.
Bodybuilding 5 and 6 are reserved for just a few strong/special NPCs in the game. D:OS 1 already has a huge problem with overpowered CC. There are also skills that reduce BB and WP. They wouldn't have a function if CC-resistance was relatively low even for best protected characters (and high CC-resistance for strong enemies is more interesting, in my opinion, than simple status immunities to protect from CC; besides high armor with 0% chance of CC sucess, that's what D:OS 2's system is forced to do for balancing). Third, there's nothing bad about 'randomness' if you can calculate CC-success, and the possibility of failing actions requires more strategical thinking and tactics than (nearly) 100% predictability. It makes combat more dynamic and less deterministic.
From what I see, enemies can have quite high intelligence later on. If they were able to control you, no matter how much you invest in BB or WP, there would be a problem.