A child is standing in front of a waterslide with 15 gallons of liquid shit about to be poured down it. They express they’d like to get out of the way while people tell them “No! You’re not old enough to make that decision!”
Is that analogy better for you now that it’s not literally life-or-death? I’d say it’s arguably a worse analogy because getting covered in shit is a temporary thing while going through puberty is permanent. But, you know, whatever gets around your pedantic view on why an analogy doesn’t work.