I disagree since the virtual games could be played at all times and the ease of accessibility may cause difficulty to quit on some individuals. With live sports there are natural breaks between games whereas with slots and casino games there are nothing and there is always an urge to play. Discipline is essential because of that. It does not take long to get pathological once the emotions get involved and start chasing a loss or placing more bets than expected. Gambling is just supposed to be done as a form of fun and entertainment not as a method or making quick fortune but one should learn when to stop otherwise the consequences can be disastrous.
It's okay you have your own opinion, but, I say "if you (players) can't control yourself, don't force yourself to play slots". To be clear, this means there are serious consequences that can lead to financial ruin, as it can lead to the belief that winning small bets will lead to winning quickly by increasing bets. So, what's the difference between this and your opinion that it's harder to stop playing virtual games? It has a similar meaning, albeit with slightly different pronunciation.