It's like that friend, and they won't stop their efforts until they at least achieve something, personally I don't think they're going to be very successful for now, AI for now is seen as a fad, it's not pure AI at all, what's done is AI, it's more important to use and have human intelligence to do any analysis well, you always see strange behaviors in some players, it may be that you're using an AI, you don't know, but beating a casino system is very difficult, I don't deny that at some point they can achieve it, but it is very difficult, an AI is not that powerful either, I know that many programmers have trained the AI in every way, but beating a casino is not easy.
They already achieved something but we know humans, we can't be contented easily and we always want to excel more or go beyond our limits. I still don't think that it will lead for a total defeat of the casino because that will be weird if it happens. It's going to cause a chaos in the gambling field. AI isn't a fad. It's a legit technology but there might be fake AI models out there who only join the hype.
A true AI is strong but it does have its own limitations. It's hard to win alone, that is why some people are forming a group. They combine their capital and share insights on how can they improve their play. Maybe they can win more but not to the point of destroying the casino.
We know AI has limits. Like people, AIs are limited by their training data and processes. They cannot demolish casinos. One grandmaster can demolish chess as a major sport like one person can destroy the world. That's ridiculous.
AI's biggest strength is helping human gamblers improve their methods and decision-making, not beating them. I don't think it's a security concern if people band together to boost AI's effectiveness. "Fake AIs" are snake oil. Users can distinguish the two.