For luck based games, it could be true but for sports betting I think you can win more than your loss.
In sports betting yeah it's different you can analyze and have your strategy on what to bet.
For some gamblers it's possible for them to have more wins but for me, it's difficult.
Well you just need to study the market and some specific straties even for sports

Yeah, sport betting is actually one unique style of betting that I have seen people win a lot of money, but at the same time, so many people tend to lose as it is not everyone that is usually good with sport analysis.
It is just like trading; some are into real gambling when it comes to trading as they have no strategy or plan when it comes to trading as well as no knowledge on being able to do some analysis to do well. The same thing applies to sport betting which is why as you see some being successful, some will be unsuccessful.