You don't consider gambling as bad but conclusion by combining the percentage of gambler suggests that gambling never have made anyone rich but instead it altered the situations of middle man into poor man. Bitcoin and gambling have lots of differences and we can't say that these are same as bitcoin investors always learn well about market trends and investigate about price chart after which they decide whether to sell or buy but gambler never search anything without query then put money and bet and rest of the things are then on good or bad future.
The journey may be different when connecting gambling with investing in bitcoin, because no one wants to bet just by relying on luck. Bitcoin has a much more rational concept and road map, where there are times when repeated cycles will take us to the next stage of achieving ATH, gambling does not have such a concept and road map, so it completely relies on luck. I agree with your statement, that gambling is very unlikely to make someone richer and even if there is, perhaps only a small group has a much stronger financial level.
Yes true, the fact that bitcoin is the rational one when compared with something may cause some people feel like that's a refreshing thing, but that's also true. I believe that we are going to end up with something that is much larger if we are careful and we could just consider gambling is pure loss.
I understand that "some" people may have made some profit with it, but the reality is that we are not going to make a profit with it, and we are going to be pretty unlucky about it as well. So, when people end up with something that is wrong, that doesn't mean that they were always wrong, that just means that they got lucky or unlucky based on what happened. This is why it should be important to realize that bitcoin is far superior because it doesn't depend on luck.