Are you sure it's not you, a parent, whose opinion might be irrelevant? I mean out of you and non-parents, you are the one who has an extremely deep and instinctive emotional attachment that might cloud your judgement and affect your ability to think rationally or objectively on such a topic.

Does that argument work in other cases? "Sure it's insert bad thing, but if you were a parent, you'd understand. I'd do _anything_ to protect my lil one"

No, being a parent doesn't make your opinion more relevant really.