SV has been funding the Mom 2.0 bubble where 20 yr olds provide Mom services to other wealthy urban 20 yr olds for a generally rather large fee. Look at startups that boil down to "Mom can you drive me to the mall" "Mom can you get me a sandwich" "Mom can you do the laundry" "Mom can you adjust the thermostat" "Mom can I crash in your livingroom overnight when I'm in town" "Mom can you mail me a monthly care package" etc. Not all startups in the current bubble are Mom 2.0 but enough are to make it a cultural thing.

Anyway the point of extreme youth focus in the Mom 2.0 bubble is it makes sense when you're 20 and urban and rich and have never lived away from home (aka mom 1.0), but once you're 40 and you have become the Mom (err, Dad, or whatever), then it's kind of a hard sell and you're just not going to fit in with the biz model.

There is also a mythology that kids will lock on to branding for their entire life, so the most popular group to sell to is kids. It doesn't work, of course, but its a very popular mythology and highly politically incorrect to question it. If it actually worked of course, I'd spend my lunch hour driving my Segway around to play Pog games in between gaming sessions on the Colecovision or something like that.