One of the reasons why the USN seems opposed to buying SSKs is the fear that lawmakers could significantly cut nuke numbers.A predominantly expeditionary force like the USN has reasons to value SSNs.
As the guy in Braveheart said, "I'm OK, but you're FUKKEED."
The US needs both. No cuts in nukes so they can do the fast attack thing all over the world’s oceans...but a force of litoral ssks to handle the shallow waters.
The Virginia Class are simply too value to risk in the litorals IMHO, but are unbeatable in any major ocean, sea, or deep water straits or passages.