Well, if the person losses in sports betting 5 consecutive times, it means he needs to stop because of the possibility of addiction but because he has no skill or knowledge about the sports and the teams behind it. He is probably just guessing making sports betting a game of chance instead of skill-based.
5 consecutive lose doesn't mean of addiction it just state that he doesn't know anything about the sport he's betting so maybe he need to do proper researching and watch the sports so that he can familiarized them. It also give him a lesson that betting randomly cannot get him anywhere so he need to be more smart placing his bets so that he can win next time and avoid losing for 6 times.
In my opinion it's not addiction but curiosity, addiction usually people will spend as much money as possible, but apart from consecutive losses it could be not because the person didn't research it but tried to find luck at high odds hoping for it but it didn't materialize or he made a bet choosing a team that is underdog but loses to a team that is not seeded, we all know sometimes there are matches where teams that are not really underdogs often win against teams that are underdogs.
Betting with losing in a row is normal because I often lose 10 times in a row so it's not because I'm an addict, after all there are certain reasons that maybe we don't know either and it's not because we don't research too, after all nobody is perfect guess the direction of the sports match correctly.
Betting then experienced losing in a row is part of it, I mean, losing streak is not new to this industry, you need to do better with your research instead of randomly pick sports that you are not familiar, something that really needed to correct, how will you win if you don't know who's your betting with? with knowledge and with proper information or idea, the chance of winning is much better and adding to that if you have some luck the opportunity to win will be more possible, just take it when you already have some decent amount, I mean quit while you have something decent in your wallet.