Then it's like saying that using Pokecheck wasn't hacking.
If RNG and Pokécheck are hacking, then so is knowing what IVs are in the first place.
Not at all.
You can check the IV's using the IV checker. No outside help needed
RNG Abuse is like using a walkthrough. So to me, it's no more hacking than using this site. "Turn on game at this time, then flip through chatot cries/take so many steps and pick up your egg/talk to Pokemon/use Sweet Scent. Now you have 6IV Shiny Pokemon". That's what it comes down to.
As for IVs not being hacking: IVs, EVs, and the benefits of Natures were never supposed to be known to the community. That's all hacked information from back in gen 3, we just chose that outside help as legit. As for the IV checker, he won't give you exact amounts beyond 31 and 0, which doesn't help for HP.