A strange idea has taken over the social conscience so entirely that it is a taboo even to say what it is. Children have come to be seen as more valuable than adults not despite but because they lack the psychological maturity that makes persons objectively valuable.
Consider the appearance of "baby on board" placards from the mid-1980s onwards.
Nobody would have placed such a sign on a car if it were not already understood by society that the life of a human achieves its peak value at birth and declines thereafter. A toddler is almost as precious as a baby, but a teenager less so, and by the time that baby turns fifty, it seems that nobody cares much anymore if someone crashes into her car. You don't see a lot of vehicles with placards that read, "Middle-aged accountant on board." (Danielle and Astro Teller)
Something has gone very wrong in the way we think of the ageing process! Fortunately philosophy can help.