I don't think it's a stretch at all. GP is pointing out a specific instance that illustrates that Musk doesn't truly understand the capabilities of the things he builds. He talks a good game, but he's not actually a rocket scientist/engineer. But he'll push for whatever he wants to push for, and people like Trump will eat it up and let him do what he wants.

If Musk wants to push for "Falcon 9-based liquid-fueled ICBMs", he'll do so, even if he actually does know they're not the best/right tech for the job. And someone like Trump will listen to him.

It's also a bit in bad faith of you to play the "you only disagree because Musk bad" card, when GP explicitly acknowledges that these sorts of bad government decisions are not unique to the US/Trump/Musk.