The core line is not "crazy expensive", a $500 addition over every core line guitar would bump the price up significantly, and as the others pointed out, not everyone wants or needs a piezo. Consider the Private Stock line, a price point 2-3 times that of the core line, where the customer can spec pretty much anything they like. A piezo would represent a much smaller relative increase in cost, so therefore wouldn't everyone just be adding piezos? Well they don't, because not everyone wants or needs one!
I don't want one for the added complexity and cost, but also the difference in tone. If I was to spec a PS, it would be a 2-piece bridge or maybe a Paul's bridge with the brass inserts. A piezo bridge would compromise what I was trying to achieve tonally. If I want an acoustic tone I will pick up my acoustic. I don't dig the blended tones so there's no value in a piezo (for me).
Also a P22 is hardly innovative, sure it's a great take on the mag/piezo solid body but other manufacturers have been doing it for a long, long time. Parker/Music Man/Godin/Ibanez/etc etc. Heck, even I put a Fishman Powerbridge (Mann Made!) in a Strat copy over a decade ago. I don't play that guitar, I keep it because of some weird attachment to that bridge.
I'm going to not mention any of the other stuff in the OPs response, everyone deserves a second chance (I got one when I made a D of myself a while back) so hopefully we can move on and have a meaningful discussion on the point at hand.