Yes I admit that the majority of gamblers are those like you said above where they come with the intention and purpose of making money, this is the more reasonable reason why the population of gamblers is increasing, but I also won't close my eyes to say that there are always some gamblers who come just for fun when they have boring free time, One of them is the rich people who are usually looking for fun in the midst of their busy lives, when they have free time I often see them in betting shops to bet and drink a few bottles of beer and there are also those who are involved in online casino types.
On the other hand I understand that there are actually quite a lot of other entertainment that they can make as an alternative to entertain themselves without involving the possibility of risk, but yes everyone has a choice and we really can't conclude for sure that every gambler comes with the intention and purpose of making money, because the fact is that there are always some gamblers who remain fine and do not experience significant impacts even though they have been gambling for a long time and maybe we can conclude that they are gamblers who come with the intention of just filling their spare time without putting excessive expectations on winning.
Be wise about this. Gamble is social, interesting, and some people adore the challenge. Not always about the money, but about the thrill, environment, and winning feeling. Human nature requires us to accept that. As long as individuals are responsible, know what they're doing, and play within their means, its fun. About freedom and choice.
Another thing is that I think it is true that there are always some gamblers who come with only the intention and purpose of entertainment and from what I have seen usually the goal is owned by the rich, the reason I think it is less likely to produce when the person already has the right way to make money that makes them rich. This means that yes as you said above that there are some people who are just looking for thrills and not money in gambling, but we come back to the fact that indeed the majority of gamblers are those who are too much in hope of winning.