Most of the time, gamblers aren't really reading the TOS of the gambling site. Almost everything online, a lot of users are just ignoring these terms the same way on how they treated agreements, for example, if they are downloading software online, they just click accept and continue then that's it. With that mindset, we not knowingly applied it even in gambling where I think we should really read the TOS to avoid conflict as we talk about money here. What mostly happens is that when we encounter a problem, that is the only time we read the TOS so it's late for us to win or dispute the house as it is our mistake in the first place not to read the TOS.
Yeah, most definitely because we want to save time and besides, we would just play anymore.
However, downloading a software and playing in a gambling site is quite different as in gambling, you could lose a lot of money if you fail to read the TOS and you got affected with it, so it's important that you read if you are betting big money so you'll not regret in the end.
Most of the gamblers are not really putting huge bet, so it's not really big if they lost against the TOS, and it's not a problem for most of the gamblers anyway.