Well, it is fair to be skeptical about all that. I agree casinos can pull different tricks to scam the users. So each individual should be responsible about researching properly and making sure he isn't fooled. If you are worried about this, then physical casinos are where you should be heading.
Brick and mortar casinos are not necessarily 100% fair too.
Maybe in the biggest licensed casinos you will find fair games, but I heard that in the smaller local casinos, house can cheat you pretty hard.
For example, they can install magnets in a roulette wheel and manipulate the outcome of the game.
More info:
https://www.roulettephysics.com/casino-roulette-wheel-magnets/Yup , that is a risk unfortunately. Some games are possible to rig for a casino, and some are not. At the end its upto you as a player to figure that out for yourself. But in general, a physical casino has a lesser probability to be scamming than online casinos.