I didn’t understand the appeal of places like Carmel Valley and Scripps Ranch until I had school-age kids. Now that I do, these areas make total sense to me: peace of mind of knowing your kids are at great schools and that their peers will be similarly motivated. Also, the convenience of not having to drive them long distances for good schools, sports and lessons. CV has the added advantage of being very close to the coast and SV tech jobs. If you have 2-3+ kids, the advantages compound.
As far as this timeshare in CV is concerned, my guess is that it would look attractive to someone that lives in a very cold place (like Toronto) to come hang out at a 5 star resort in San Diego every winter.