I remember from the Obama "cash for clunkers" that the CO2 emissions from constructing a car was about the same as the CO2 emissions for driving 20,000 miles on it.

This foundered the entire rationale for "cash for clunkers" to switch to more fuel efficient cars, but facts didn't matter. Politics did.

This was a choice between a new ICE and a new EV so your point is meaningless

A lot of millennials and gen Z's are choosing to not have kids. No real reason for those without kids to give a fuck, and those with kids have a larger carbon footprint than those without children.

The math works because I don't drive much.