Well they wouldn't be the first nation state to invest an enormous amount of resources in trying to develop science fiction like capabilities.

Excluding a range of possibilities with a reasonable amount of certainty is a very expensive exploration quest. After concluding it was all a wild goose chase it is still superior to nudge your adversaries in a direction that doesn't exclude this specific range of opportunities.

I feel like the range of possibilities that appears to break the laws of physics entirely doesn't need resources to exclude, at least in the absence of harder evidence than some grainy video. If you're referring to Star Wars, at least that seemed physically possible.