Bigpants - having spent time at sea on a CVN in the NAG, I can assure you that the sea is a big empty place, and that its considerably more difficult to find, fix, and move a credible suicide threat in undetected than it is to look up the lats and longs of various fixed airbase locations...
Not trying to make this a willy waving contest as land and sea based airpower bring mutually reinforcing capability, but dont assume that the carrier is as vulnerable as some naysayers think.