I agree OP.
The teenagers I have spoken to in the past who talk about having babies talk about how they will dress their babies, what branded shoes they have seen that look so cute, how they will put little alice bands in their hair, or Nike trainers on their tiny feet, because they look so cute.
They talk of having a little baby to squeeze and cuddle, to walk to the shops with in their swish prams.
They never talk about how they will cope with sleepless nights, multiple changes of outfits, the all consuming tiredness, the responsibility weighing them down, the bringing up milk all down their clothes, the difficulty getting a newborns feet into the cute shoes, the possibility that their newborn will have no hair to put into cute ribbons, the crying, the endless crying that some babies will do, the dirty nappies, the slippery squirming baby in the bath, the relentlessness, the loneliness, the washing, the financial implications that go on and on and on.
Whenever I brought up this side to having children, they replied with...'but they will be so cute.'
'Not at 4 in the morning after 3 months of very little sleep they wont'
Most teenagers I have come across do not want to hear the reality. They want to hear how cute and cuddly babies are.
I know this is not all teenagers, ime it is most but my experience is limited, I haven't spoken to most teenagers, only the ones I have come across.