A lot of you are missing the point. Think of it from the 9 year old's perspective.
I think if anybody's missing the point here, it's you.
First off, all addictions are traditionally resolved by total abstinence from the drug or behavior, along with a support community. ("Alcoholics Anonymous", and so forth). Nor does "addiction", have to be a physical dependency. Take for example, gambling, where the person's own body supplies psychotropic substances which stimulate the pleasure centers of the brain
The parents were limiting her gaming hours to 1 hour on week days, and 2 on weekends. That's no time at all for any hobby. It's because the parent's turned it into a commodity that the 9 year old made the deliberate decision to wet herself so as to not waste her 'playtime'.
Adult gamers, (ostensibly gaming addicts"), have been known to partake of the same behaviors, save for the fact they usually have the good sense to wear diapers. But if you're trying to pass that off as "normal" it's not, Let's just say that it's a direct analog of an alcoholic's "bender"..
For an adult, peeing themselves would be unthinkable. But for a 9 year old girl, it's no big deal, and an effective way of saving time. This isn't addiction, it's just a normal 9 year old being a 9 year old.
Now, a nine year old has supposedly reached, "the age of reason". Which also brings with it the capacity for "ulterior motivations".
Childhood tantrums lead to bizarre adulthood analogs of such outbursts.
Take the case of Kim Jong Un. Raised in luxury, told he would run the entire country one day, one must come to the conclusion that being indulged as a child, every time he pitched a tantrum, someone would pander to his every whim, no matter how extravagant those demands might be.
Fast forward to the present, and you have a sociopath, who, when he isn't given enough attention, starts building nuclear bombs, and shooting off ICBMs. If that isn't a childish "look at me...NOW, humor me...NOW", I don't have any idea what would be.,
Adult gamers, (ostensibly gaming addicts"), have been known to partake of the same behaviors, save for the fact they usually have the good sense to wear diapers. But if you're trying tyo pass that off as "normal"
If anything, the parents should be increasing her gaming time to something reasonable for any other hobby. Or, teaching her that if she does her homework/ study, she can spend longer playing on the xbox.
No actually, her parents should be encouraging her to learn programming, so she can earn a solid living writing games.
An no, she's not too young to be tasked with organizing her priorities toward taking her place in the adult word, as a self reliant, wage earning individual.
In any event, the television is very often scornfully referred to as, "the electronic babysitter"
Well, these new fangled "devices", are way more addictive than the TV ever was. In fact, one township at least, has taken to writing warnings on the pavement at street corners, reminding people to look up from their damned cell phones, lest they should walk out in front of a buss.