I don't measure the casino's overall honesty thru RNG personally because, in the first place, I don't have the technical knowledge to know deeply how provably fair the game is. I always looked at their established reputation as a main factor in choosing the best online casinos.
At some point, I believed a reputable casino won't likely cheat by manipulating the algorithm of RNG or any related stuff.
Aside from the casino's reputation, another factor of mine is to always stick with the famous casino game providers since these providers won't be present at most casinos if their service is sh*tty and not trustworthy.
The truth is that I did not have much knowledge of the RNG, if I had read something but I did not have very specific knowledge, then this RNG is not as reliable as we sometimes think, I know that they are systems to make it completely fair, but when we realize account, it may be Responsible for giving us a hard time in the casino for not allowing the withdrawal to be instantaneous, of course this has Nothing to do with a new casino deciding to make its withdrawals Manually, from its manual withdrawal.