I think the majority of the gamblers out there when they think about the very first thing they want to do when they finalize the process of creating an account at a new casino, do not consider reading a legal document regarding their responsibilities toward the casino as being at the top of their list.
Still it is important to do so, because as you mention there are casinos out there which are looking to aggressively use their TOS against their clients as a way to rob them.
For the novice gamblers I also found they don't want to read the regulations of the casino and after some time they file a complaint because they have experienced the problem of violation of the casino rules.
The importance of reading and understanding casino policies is that we can avoid problems and be more careful in every action so as not to violate existing regulations.
But that only applies to small casinos that don't have a very good reputation.
After all, there are lots of big and trusted casinos that we can use, so it's better to avoid shady casinos that could make us suffer losses in the future.