Both types of casinos gives you the impression that you are in control but you are really not. Just they always say during a magic show, the more you look the less you see. To be on a safe side just gamble responsibly and go home.
This is the real truth, there's no way they would just give the gambler a bad impression knowing that it could reduce the person's interest, so what the casino does, both physical and online casinos, is to make gamblers win for the first go and then the rest is a history. The system is designed in such a way that you wouldn't even have that thought of rigging but can just think it's the usual ways of gambling. I was thinking that even if casinos are to be rigged, online casinos would have the case more but gamblers can not detect that easily.