I would have phrased it differently. Not a more or less pronounced gambling addiction (in the sense of the severity of the disease), but a faster or slower addiction. Of course, slot machines become addictive faster due to the fact that you don't have to think about them, the wide variety of games, and the bright, attractive design. Mental efforts, interpretation of statistics in sports betting can prevent the rapid emergence of addiction. Betting can be perceived as a kind of task that needs to be solved. Or as a semi-gambling game against a bookmaker.