That's why most of bettors always lose, even though many people say it's a skill based game, but it's still not enough to give a higher guarantee the gambler will win and beat the house.
As much as I agree that some types of games that are considered gambling are actually skill games (namely poker) I wouldn't say the same thing about sports betting. Sure, if you have good analytical skills and knowledge of the particular sport you could potentially spot opportunities when the odds are misplaced by bookies giving you the mathematical advantage, but that's more about finding anomalies. By design, sports betting is not far away from "classic" casino games where the house has the edge. That's why we don't see many (or at all?) professional sports bettors.
I agree,many people claim to be professional sport bettors by opening several accounts in tipping websites and other related channels in social media yet the fact is that they all lose in the long run simply because as you say it is hard to always hit a win in sport betting.Especially in tennis where they have the low odds of 1.15 and such,I once payed a premium subscription in a tipping service,not much just 9.99 GBP monthly and what these guys were doing was collecting such 1.15 odds from tennis,basketball and other sports,they almost never used soccer and making a parlay with odds of 2,I must admit the first month I ended in profit but several months after I ended up losing big amounts so I don't think anyone can win in the long term in sport betting.
i believe, there are few of these sportsbettors who can win in the long-term. but those sportsbettors somehow invested some of their winnings to businesses, so even if they go back to betting, they have other means to earn money, so they are not totally broke.
but for those bettors who are always going all in on their betting activities, i guess, they are the ones who will go bankrupt in the long run. as they have no back-up plan to address their financial losses from gambling, they will soon find themselves financially rekt.
Everyone who is a gambler should have a different source of income. Many who have been involved in gambling for a long time have learned to understand well why it is necessary to divert money from gambling to other businesses. Many gamblers prioritize emotion when it comes to sports betting and that's where their chances of losing increase. Gambling result is zero if all money is lost after long time betting. Moreover, since the possibility of losing is high in gambling, there is always a need for money. If there is another source of income, then a gambler's gambling risk can be reduced, if the risk is reduced, there will be less human pressure, so a gambler will be physically healthy.