It gives you more loading zones and more approach/departure windows.

The idea that a bunch of GA misfits flying their mosquitos will be helpful in case of a major city being cut off by land is something only the AOPA could come up with. In that event they'll be landing C-5's and 744's full of potatoes at SJC. One flight of a 744 is worth 400 GA flights.

During peak hours, SJC has as much traffic as it can handle already. Why would you want to force more general aviation into that mix?

Also, 880, 101, and Coleman are all gridlocked during rush hours.

Doesn't the Civil Air Patrol still use Reid-Hillview?