if you can spend a small amount of time and money win a huge amount of prize and never play again I suppose it could help your mental health.
The thing is, most people don't want to to stop regardless if their first experience was good or bad. If it was good, they want to repeat it, thinking luck was on my side last time, perhaps it will be so again today. If the gambling experience was negative, they will try to recover their previous losses and land on top the second time.