Gotta say, this is a weird argument.
A 4BR split level in Beachwood that would have stayed on the market for months before selling for $250K a few years ago stayed on the market for 12 hours and had 10 showings and sold that day above asking price at $410K.
If you walk into any shul here you'll see them filled to the brim with new families. Though back in the day Chabad and many "center/mainstream" families went to HAC, it seems like a lot of them are going with Mizrachi these days and their growth has been explosive from what I hear.
Both of my kids are now in HAC, though among the Chabad community a majority now to go Mizrachi compared to none back in my day.