Let’s start with the claim that these vehicles have crash-landed on Earth.

Whether one believes that said vehicles are extraterrestrial or inter-dimensional in origin, it is an extraordinary leap of logic to assume that they are janky enough to crash, let alone with the frequency that Grusch and other UFO enthusiasts claim.

Star Wars, Star Trek, Futurama, and Rick and Morty all frequently depict spaceships that crash-land, for the sake of narrative, rather than logic.

A crash forces the characters into a difficult situation, perhaps marooned on a hostile world, or forced to engage with alien inhabitants; it is a widely used trope because it sparks drama.

However, if one assumes that alien life is advanced enough to design vehicles capable of prolonged periods of space travel (or inter-dimensional travel), then why are they crashing like drunk teenagers?

Indeed, why would these vehicles be piloted at all?

https://www.forbes.com/sites/danidiplacido/2023/06/13/claims-made-by-ufo-whistleblower-david-grusch-are-pure-science-fiction/?sh=ae8dc1c3a418