Well, watching football all day is addictive, playing e-Sport alsofucking additive, not only for those who play it, also for those who watch it.
So, the addiction effect is always present, but it is activated in "disease" mode according to each individual.
Of course there are phases of stress, intensity, but it is each person's path to control them and that is where I raise my hand to say; Betting should not affect your healthy mind, if you have a positive experience with the game.
By the way, with positive situation, I do not mean making profits, its regardless of this, winning or losing, you remain mentally healthy.