I don't really focus too much on RTP and RNG related stuff since the reputation of a casino(FIAT or Crypto) matters more to me in comparison. If a casino has a solid reputation, I deposit and gamble away.
If it has a bad reputation, I avoid it like the plague. I have never been scammed so far thanks to researching the reputation of whichever casinos that I played in thoroughly.
A keen gambler would always check on the reputation, reviews, and trust rate of a casino site rather than RTP because once a casino site has good feedback, it already affects the whole performance and services that they offer. Positive and reliable ratings for me are already enough.