Carrier support and cruiser helicopter hangars

Why did the Virginia- and California-class cruisers have landing pads but no helicopter hangars?

Carrier-centred aviation responsibilities and cost savings are offered as explanations, while individual configurations and refits are not examined.

The question describes Virginia- and California-class cruisers as having helicopter landing pads without hangars. The explanation attributes this arrangement to an expectation that the carrier would provide aviation support for its escorts. Saving money reinforced that division of responsibilities. Omitting accommodation for an escort's own helicopter is criticized as a shortcoming in such late cruiser designs, without tracing differences between the classes or changes during their service.