Yeah it’s a long and complex topic. Perun takes the same view as those people you linked but I think there’s several interlinked developments driving this, one of which is the pace of advancement in space access. Even if it won’t work today this is realistically a 20 year project regardless of Trump’s desire to have it by 2028, and if launch costs fall another order of magnitude between now and then and you can make really small interceptors it changes the math a lot. There’s also the broader game-theoretic and strategic stability (or really strategic metastability but this is a whole long and complicated digression) issues which tldr means that if you think such a thing could be possible it would allow any actor who could accomplish it to alter the fundamental MAD equilibrium we have lived under for 80 years and this would come with immense first mover advantages.

The others would also build their own I imagine but yeah, the tech is cool despite the purpose

Checking out Perun