There is some truth in the defense argument. I mean, couldn't you just watch the Helios leaving (assuming its not from an orbiting moon), then put your commander else where and position some huge orbital fleet just above where he was? You can get 126 avengers for the cost of a helios+manhattan. Or 47 bluehawks. Or your own manhattan insta-blowing up his orbital fleet (not sure, forgotten how you would activate them) as soon as it arrives. If you can spare the attention, the nuke wrecking the infrastructure might be worse.