Yup, they are protecting their names and the image that they are trying to portray though for those who are just ordianry gambler, most them doesn't care anything as they just wanted to play, gamble, enjoy and win, those are the things that's present inside the minds of a person who are involve to this venue of entetainment, and same with what you said, doing it with your own will won't hurt anyone or affect anyone unless you are bothering them in some ways.
Most of us live in a society where we're looking for acceptance in some way, to not be looked down upon or labeled as weird or crazy But you know, I've learned that this doesn't teach us anything or bring us any good. If we like doing X activity, it shouldn't matter to us whether others accept it or not The same goes for casinos, sports betting, everything is taboo until we decide not to give it any importance.