If a casino is careless on one of those things then I think it's not worth playing on their platform. Both are important when establishing an online casino. You want your customers to trust you. You can't just give them a bare minimum service just because you think a part of your security is not that important. It's dangerous to have their identity be stolen as no one knows what hackers will do to your information. They can use it for illegal activities or maybe spy on the user's personal life and rob him afterwards. And of course, you also have to make sure their money in your platform is safe. That is where your reputation primarily at stake.