It's actually more related to wanting something out of Satellites that they don't think they are going to get from a larger parent --
1) The Army tends to look at the fact they have armed helicopter because the USAF doesn't want to do ground support stuff.
2) The USAF has Security Forces as the Army doesn't want to provide soldiers to look after aircraft that won't do ground support.
3) The USMC tends to distrust everyone and duplicated all efforts because everyone else ignores them.
4) The Navy well they do Navy stuff
5) SOCOM knows the other services are so fucked up, if they want something done they will do it themselves...
and there is justification for a whole lot of shit in DoD - not just the Space aspect.