> USN can still do whatever it was made for
One of the primary functions of navies historically has been to secure vital shipping lanes. It’s a big deal that USN can’t seem to fulfill that function anymore.
It can be safely said that current carrier groups were not built for that, they were built for power projection on land.
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I'm not sure that the USN would have been any more effective 30 years ago if it tried to make a narrow waterway that is off-shore from a medium-strength world power accessible for safe commercial ship traffic. Effective anti-ship missiles have been around for a long time. Given how understandably sensitive commercial ship crews and owners are to even slight danger, there's just no way to reduce the risk to the necessary near-zero without a prolonged air campaign and/or land invasion to support the naval effort.