As long as they are gambling it wouldn't lessen those bad habits it wouldn't matter if they are gambling through online or in real life.
It would still be the same, They would still be stressed out because of the outcome of their games so they would still do what they do when they are gambling in real life.
Yes, there's not that much different for the addiction of gambling and other types of addiction. The effect is the same and bad habits will remain bad habits be it for gambling or not.
Indeed we need discipline when we gamble. If we can control ourselves and not eager to win or to chase back the losses then we wont face worst problem after.
Every gambler is eager to win and that's why we gamble because we want to win. I haven't seen a gambler who's eager to lose or if there is, I forgot it.