Are Manned Warships Already Obsolete?

Across the world of Western defense analysis, there's a fringe, but increasingly popular idea in circulation about the world's navies. The idea, put simply, is that the idea of a navy that relies on manned warships is about to become obsolete. Or even worse, that it already is obsolete.

On the 21st century battlefield, where drone swarms, hypersonic cruise missiles, directed energy weapons, and ship-killing warheads are all either on the horizon or already deployed into combat, sophisticated warships are not an asset. They're a liability, or at least, that's how the thinking goes.

So, are global combat vessels, at risk of becoming obsolete, have the world's navies, the pride and joy of their respective nations, already turned into a liability?