Calling gambling a form investment is very misleading. Anything called invest is something that grows value over a period of time with some level of control and planning. Gambling is just about how lucky you are there is nothing profitable about it . Few win but many losses because of the risk that is attached to it . The only entity that can make money from is gambling is the company because they make more money if others are losing. So it's a bad idea to call it an investment.
You’re right on that point. If you were a corporate owner of a gambling establishment, it could be considered a legitimate investment. However, from the perspective of a gambler, it can never truly be called an investment because the players themselves are the primary targets of the owners.
Furthermore, it’s risky to keep funds on casino platforms. Most of the time, you can’t easily withdraw your money, especially in large amounts. If a casino is predatory, they can easily fabricate issues against a gambler even if no rules were violated. In those situations, the gambler is often left helpless regarding their transactions.