Long term winners will always lose in the long run,
Did an AI write that for you? I doubt it, although sometimes it does hallucinate.
Saying it was possible to make a good profit from gambling before and it's no longer the same way now makes it look as if there have been some adjustments made in the gambling system, or are you implying that there is an unfair system now? in gambling, which makes it a bit difficult to win and make a profit in the long run compared to how it was back then.
The one you are responding to (who is the one I quoted above) is an AI spammer, so I wouldn't pay much attention to him. Related to what you say, I have seen interviews with professional bettors who say that it is increasingly difficult to win (as in poker), mainly because the winners years ago what they did was to find little exploited niches, such as minority sports or second leagues, and find their value bets there. With time, automation, the use of statistical programs and AI, the bookmakers have been adjusting the odds more and more, so it has become more difficult to win even in those niches.