While luck is a factor (of course), the substantial effort and skill involved make sports betting distinct from typical passive income. Therefore, I believe that sports betting winnings should be classified as active income, similar to trading or commerce, which involve both risks and the potential for profit or loss, like in any business.
This is only my point of you... what do you think

It's so sad that people do the opposite or should I say they practice gambling as passive income where they always expect to get something even though they know that's it involved risk where you may or may not make anything from it. If at all gambling is a passive income, I'm very sure that many casino wouldn't be functioning again because many people will be richer today from sport betting and some people might have stopped working and focus on gambling.
However, do you know that casino are passive income earners from gamblers, this is why they continue to make people and increase the rate of their marketing because it's only when they have more customers they make more money, no customers that gamble, no passive income but it's not the same with the gamblers, this is why gambling can never favour gamblers.