Well, I am sorry, but you're wrong on both counts.
The F/A-18 does things (slow flight, handling, high AOA) that the F-16 simply can't.
As a result, the Blue Angels fly a show that the Thunderbirds can't. Inverted flight, slow flight, close flight. The Blues have a few energy (thrust/weight performance) maneuvers that equal the Thunderbirds, but zooming up high takes the show away from the crowd and the Blues design their show to stay close to the crowd, not zoom away from it.
The Thunderbirds show is designed to impress amateurs. Clearly that's worked. The Blue Angels impress both amateurs and pilots.
The T-Birds have never, ever flown as close together as the Blues. That part takes real skill. Real piloting skill.
You claim that they can.
But they never have.