The FCC is charged with regulating communications of all distances, not just those crossing state lines. One of their primary missions is ensuring fair access

The FCC is charged with regulating communications of all distances, not just those crossing state lines. One of their primary missions is ensuring fair access to the wireless spectrum and keeping someone from jamming it and preventing others from communicating legally. Satellites must communicate to be effective, and satellites form a significant portion of our communications backbone. A rogue satellite operating over spectrum it isn't licensed for prevents other from using that spectrum, and a rogue satellite colliding with another satellite could cause debris and disable a bunch of other communications platforms. The FCC isn't being orbital traffic cops, it is doing its job. While the FCC has done a bunch of distasteful stuff regarding net neutrality recently, the folks taking actin agains Swarm are clearly in the right.