Physically abusing your child by chaining them to the radiator is not a parenting decision.
Providing lunch at something the child is required to be at by law is not a parenting decision.
Requiring annual physicals is not a parenting decision, nor a health care decision. However, requiring a specific treatment is both.
Alcohol consumption is a grey area, and a cultural choice the country has made. Why not make the driving age 14? 18? It's a question of maturity. But this is a poor comparison. While alcohol has an objective measure of physical harm (ie: LD50, a measurable and detrimental effect on developing minds), video games do not.
Listing these as examples is not a justification for the government deciding for a parent how much time their child can spend on video games.
And for disclosure, I think a time limit is a much needed societal thing. But the government must not be the one to make that decision.