Miraculously, that’s all it takes to defeat a trillion dollar navy. Imagine what Iran or China could do with no navy to speak of (let’s pretend the Chicom subs don’t exist).
Tactics and strategery have changed [as always].
It's worse than that. Did you never hear the story of a war sim under Obama versus the Norks?
The general playing the Norks went all-in at zero hour, and overran Seoul, overran Yongsan, overran Humphreys, overran Tango (!), crippled PACLFT on station for 500 miles, and immediately warned the US any retaliation by US would prompt a nuclear response.
The general running the sim ordered a full restart.