There should be no surprises here, it's not that they don't want to benefit from gambling.
But they are Singapore base company which has as very strict law as far as gambling goes. Even if they have one of the biggest in Asia, they won't allow their locals to play in their own casino. Mostly tourist goes there to play.
Gambling could add another layer of noise to the company's publicity, which the management isn't interested about going that route. Irresponsible gamblers can be loud and yield troubles too, by bridging rules and not staying up to the standard of whoever assists them with paying for gambling activities.