That's a curious position. Contracts are legal, but minors can't enter into them. When I go away from home, leaving my minor child in the care of his older siblings who are legal adults, I need to leave legal release authorizing his older siblings to seek medical care, otherwise, except for life-threatening circumstances, physicians are forbidden to treat him under existing laws.
The argument for the invalidation of anti-abortion laws was based on some notion (speciouly drawn from the Constitution by a kind of mystical 'reasoning') that the state ought not intrude on the privacy of citizens to enforce uniform judgements about such matters as when life begins. Giving the judgment of those matters to parents in the case of minors is in accord with a great deal of statutory and case law, and (unfortunately) contrary to the howls from the left would not really do anything to 'overturn' Roe.