was watching a video about ICBM detection/taking them out in boost phase, and needing a lot for coverage if you had these LEO satellites ready to go but need a lot of delta v (fuel), star link... plenty of em but nah it's for internet/basic navigation/not much fuel
This is exactly what Golden Dome proposes to do for missile defense. It improves the math of missile defense a lot compared to past proposals and it’s not completely crazy but it’s still not certain if the technical capabilities would be there even with a fully operational Starship.
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.
My first thought about that is you'd need a lot of satellites already nearly co-planar with the ICBM's inclination and there probably aren't enough Starlinks in any given inclination to make that realistic (granting secret dV and a sporty enough TWR). Boost phase is pretty short.
was watching a video about ICBM detection/taking them out in boost phase, and needing a lot for coverage if you had these LEO satellites ready to go but need a lot of delta v (fuel), star link... plenty of em but nah it's for internet/basic navigation/not much fuel