Disbanding NASA would be one of those symbolic things thay people will associate the dusk of American empire.
Cargo-cult requires a rigid through-line.
What criteria would you use, to choose to avoid something in order to preemptively avoid hindsight analysis? It's a nonsensical line of thinking.
And here, the US does not decline because of some symbolic action, but rather decline causes the action.
This confusion of cause and effect is literally a kind of magical thinking.