Its a good point Hornet, though my boss would tend to disagree with you on a couple points.
1. He drove the Wisconson during the Gulf War 91.
2. The Marines currently have no shore bombardment capability - you can fire excalibur rounds at $100,000 a pop, but it doesn't get around having the capability of having to do more. You aren't going to fire a rail gun in ashore if all you have is KE rounds.
3. If you remember back, the reason the BB's were reactivated during the Cold War was b/c of the Kirov and heavy battle cruisers the USSR was putting out - mostly being missile boats, the armor belt on the BB's was suitable to countering those battle cruisers and still retaining their shore bombardment capability.
4. China is reverse engineering Russia's gear - albiet not always successfully, but knowing they are tearing down a Carrier to try and cut 30 years off the learning curve says its a blue water challenge.
And 5:
Sometimes we need **** to blow up with these guns. I know a few people in the Bay Area who could use a stray round or 10, and the Iowa is parked right up the block.
But on the upside - a little story from Korea:
"Scratch One T-34
Hitting a tank with a 16-in. shell from a battleship's main battery is something like potting a mouse with an elephant gun. It isn't often done--but when it is, there isn't much left of the mouse.
One night last week the 45,000-ton U.S. battleship Wisconsin (which relieved the New Jersey last month) lay off Korea's east coast, firing her secondary batteries of 5-in. guns in support of U.N. ground troops ashore. Finally came a call for heavier fire. The No 2 turret crew swung into action and five 16-in. shells, weighing a ton apiece, whistled into the target area, 8,000 yards away.
Result: direct hits on two Communist gun emplacements, one T-34 tank. Said an observer: "With what's left of that baby (the tank), they can't even make carpet tacks."