I think my history of gaming has made me "stronger". I don't mean physically. Because of the RPG's I play, I believe I think in a different way than I would if I hadn't have played them. That was an odd sentence.
Anyways, gaming can be negative or positive, it just depends on what you like and what you are trying to achieve.
And if you say fighting games serve no purpose, wrong. Timing and quick reflexes can be improved through such games.
After all, in the end, they are only games. Too bad not everyone realizes this.