Especially for the women. Not to judge all women but its just that I have already heard form Joe Rogan interview about women got addicted to gambling and most of the time they started with slot machine, just drinking their coffee beside it while playing slot machine. And then eventually just keep doing it every night til they upgrade to cards.
Music is addictive, watching porn is addictive and everything can be addictive in someway for someone sonwe can't simply generalize the things and target particular game. Personally when I okay slots I just keel on going but I have seen people eho drown in the sport betting as well so it really depends on what kind of game they love.
Addiction to something happens because the sufferer feels comfortable, full of satisfaction (dopamine effect) when doing that. slots feature amazing animations and also great prizes easily if the player is lucky. I don't like slots but for lottery and soccer betting, I really love and feel addicted 
Easy to win with slot machines, not sure why is it that every person will wins during their first play with slot machine.