British Harriers sometimes flew so low over their positions on strafing runs that the soldiers mistook the sudden explosive roar of their engines 60 feet overhead for the explosion of incoming mortar rounds.
Damned if you do, damned if you don't.
I suppose they could lay off the CAS and leave the squaddies to their own devices.
As for the Chinooks, yes they are quite stretched over there but its better than nowt or trying to drive supplies in.
As has been mentioned, many of the rank and file infantry, booties etc have nothing but praise for RAF Chinnys and Harriers, as well as TWA's Apaches. I'd suggest that the author of the email is going all political himself, either in an anti-Government way or more likely anti-RAF.