Secondly, since the SH operate entirely or nearly so in support of the Army, could someone explain what is the point of having them operated by another service?
Because the Army are not currently in a position to take over SH, and SH don't want to become Army.
The AAC have a great number of fine pilots, but not enough to replace the entire SH Force when they PVR. Then there is Engineers.........
A good idea, yet a little simplistic.