Being defensive accomplishes little unless you can frustrate the enmy into picking a different target. The Carriers were not being held in reserve to be used for offensive operation when numbers would be more balanced—they were “hidden” way out of any useful reach. (That’s not a tactic—that’s just lame!)
If the country is going to fold because of 1 or 2 enemy CVs patrolling then there are bigger issues that need to be addressed. Besides if you have to go down it is much better to do it with guns blazing then on your knees.
Side Note: Widewing—DOODY understands arena dynamics and strategy more than you could possibly imagine.