Having kids is no more proof that a person is ready for parenthood, than being tremendously football knowledgable at 30 makes a young man ready to run an entire football team. (And I'm in no way questioning whether you're a good parent!)
Our Founding Fathers put age limits for our Congressmen and for our President for similar reasons.
I'm VERY skeptical that a 30 year old is ready to face such a daunting task. There's more to managing than knowledge and talent; wisdom takes more time (usually), and experience is irreplacable.
I'd be pretty worried if the Rams took this young man as their HC.