Farmers who have chickens for eggs especially on a large scale, easily get tired of eating the eggs from their chickens or even eggs in general. Caterers get tired of eating their own pastries, just as people who are exposed to certain produce get tired of them due to over exposure. Do you think this experience is the same for casino owners and owners of sports betting platforms?
Do you think that the owners of casinos and sports betting platform, gamble as much as other people do? If they gamble, do you think they gamble on their platform?
They probably don't unless they get rich first. That's because one can simply not get rich playing unless he fucks over the platform he is playing on. (in other words stealing from them) That's how gambling works. The casino wants your money and you want the casino's money. Somebody will have to bend.
If the casino owner plays with his own money (on somebody else's casino) he will lose that money to somebody else. The aim of the casino owner is making money and once they start making more and more, they will probably never ever think about playing because playing would mean losing.