After Vincennes shot down a civilian aircraft it likely made the US Navy a little hesitant to make the same mistake again.
Then you have to ask yourself when was the time a U.S. Navy Carrier came under attack while at sea
Remember how many terrorists have we killed in Afghanistan and Iraq over the last 20 years, yet they seem to have no shortage of new recruits, they’re approximately a billion Muslims on the planet that’s a lot of potential recruits who are committed to the cause
The Navy was prepared and shot down what they thought was a threat, and that was 35 years ago, almost a quarter century ago the sailors were slow and the USS Cole was damaged.
It isn’t like the Navy isn’t at least as aware of the modern threats to its ships as you are.
If you read my post I naturally recognized that there will be replacements and addressed it, did you read that post?
We can all sit here and describe negative possible scenarios but what is your point? Your point seems to be weeping at the helplessness of resisting.