I actually don't really believe in gambling games like that which are full of luck without relying on any ability so I never try games that have a Jackpot there because it will definitely be difficult to win even though winning is very slim the chance will not be more than 1% and I believe that even though there are many of us I see people publicizing their wins, it's just part of marketing, nothing more, for me sports betting makes more sense and consistently wins more than gambling in a casino.
You're right sports betting makes more sense for me also and I personally place sports bets because in those games luck doesn't plays a very important role but still one should be somewhat lucky to win at sports events as well. In slots or the other casino games that are mostly dependent on our luck won't work for those who don't have a unique type of luck.
I think you're somewhat right that the ones who publicly announce their winnings might do it for the sake of publicity and marketing purpose only. But, I think some of them really get happy when they hit a huge jackpot and that's why they share their winning with us so others might get encouraged from their winnings.
Sports betting is like combining your skills and knowledge with luck, which means that by using the skills and knowledge you have, indirectly it will get you closer to winning, and obviously I also prefer and recommend anyone to bet better. types of sports betting, especially if you have good knowledge about the world of sports, indirectly this betting will allow you to save a little on your gambling budget because you will not always gamble full time because you will only bet when there is a match scheduled. , while in other types of gambling such as slots or others it is clear that it is very possible for you to have difficulty stopping because this type of gambling has properties that really stimulate the human brain and mind to continue playing and in addition it is true that slots are a game of pure luck which is simply put. if you are not lucky then you lose.
The point is that it is not easy to be in a lucky situation, let alone to get consecutive wins in this type of betting, and what happens is that as we know, losses dominate even more and this is the reason why I think it is better to bet on sports betting only. On the other hand, regarding the problem of those who announce their winnings, it is clear that this is an action to get praise from other people or a promotional action to attract more audiences, but on the other hand, if the person who publishes it is not a streamer or influencer who is always suspected of being a casino promotion agent then I think I agree with you that the publications they do are nothing more than to get praise from other people, including some friends.