It's pretty easy to de-orbit satellites or space-based stations. An SM-3 could smoke the ISS pretty easily, and they cost like 10M and we have thousands around the oceans.
Starlink numbers already in thousands (and cost much cheaper than 10M). And that is still using Falcon, not Starship. And a ground launched missile would be easily "cooked", once it exits the atmosphere, by a direct energy weapon - very easy in space.