You mean not to hear the sound of the slit matching or the casino games? I enjoy gambling with the sounds. Even if my device is having low volume, I slightly increase the volume so that I can hear the sound of the games. That does not make me an addict or undisciplined but it is what I love. I can not be playing the games without the sound, I will not enjoy it. This is not about mean been kiddy or not. It is not about id.
Great for you, but from what you tagged I wrote that you need to be a disciplined gambler and see those sounds as things that makes the game fun and that is what you are doing. But for those that are getting addicted to the sound and gambling irresponsible they can try blocking out the sound. You may not have this problem but people are really facing it.
What's gambling without sound? If you are not betting on sport games that you might want to have a quiet environment, I don't think sound is something that can lead to any addiction. Sounds are ways of making things fun and simple as possible. You don't expect people to be playing slot and the machine be quiet, everywhere will look like a cemetery. How do you think I'm going to sound if everywhere is quiet and one person shouted when they hit the right combination? You will definitely be looking at him like insane person.
If you are the type of person that is affected by sound, you can use headset or play at home for your own convenience but trying to pin that on everyone doesn't sound too convincing about any addiction. Like in your phones and PC, you can disable it and enjoy your good game without any interruption but I still think that this doesn't make one to be addicted, maybe you wanted to say sound takes away gamblers attention too much.