If the average peak annual earnings of bright people are $100K, and if years skipped mean more years worked, then each year skipped is worth $100K. I wonder why people rarely consider this. $100K is a lot of money.
Purely from an economic perspective, having your child enter post-secondary 3 to 5 years earlier than agemates
also allows for a cost-savings on higher education, too. I'm sure that must seem incredibly gauche to parents who don't yet have kids in college, but there is pretty much no WAY to not think about the cost, frankly. It's eye-watering and it climbs by 4-8% annually.