Pretty sure having kids is worse for the planet than driving an suv. The rest of your post makes sense though.
I find your question very shortsighted and narrow minded.
I was actually hoping to illustrate with my own little anecdata about how even if you don’t like them, there seem to be various one-way-ratchet effects pushing their uptake, and this was my personal mechanism. Consumer choice doesn’t always reveal preference—I’d much rather there were a car that fit our situation (back issues + loading kids into the seats also played in here).
It should probably be framed more diplomatically and contain a cite to support it. Probably.