“In the Debrief article, Grusch does not say he has personally seen alien vehicles, nor does he say where they may be being stored.”
David Grusch claims the US holds “intact and partially intact” craft of non-human origin. His evidence is interviews with other officials. He has not seen a craft, cannot say where one is, and his colleagues vouch for his character instead of his claims. A 14-year intelligence career and a “strongest possible moral compass” review are not a spaceship.