My initial goal was to play gambling as entertainment, so I didn't want to bother thinking about whether gambling was cheating or not.
In my opinion, as long as we choose a trusted gambling site with a good reputation, there is no need to worry that gambling sites are
cheating. Because it is impossible for them to sacrifice their long-established reputation by cheating, but it is up to each person. There
are people who do not feel bothered by regularly checking the fairness of gambling sites to make sure they are not fraudulent. But for me,
it is a troublesome job if I check gambling sites too often, so I can't enjoy playing gambling.
In my opinion, as long as we choose a trusted gambling site with a good reputation, there is no need to worry that gambling sites are
cheating. Because it is impossible for them to sacrifice their long-established reputation by cheating, but it is up to each person. There
are people who do not feel bothered by regularly checking the fairness of gambling sites to make sure they are not fraudulent. But for me,
it is a troublesome job if I check gambling sites too often, so I can't enjoy playing gambling.
Well, in genuine casinos, they don't really need to cheat to make huge money. Just like any genuine good company, there's no need to cheat at all when it's guaranteed that you will make money in the long run!
It's very much in the interest of the casino to stay fair because then players will wager more, and the more they wager, the more profit casinos will make because of the house-edge that gives the a mathematical guarantee of profit in long run all the time 
each game favored the fairness for the casino operators meaning gamblers is at either 60/40 winning chance or much lower. in this case the longer player bet is the biggest profit owners gain.