Squirrel 41, the 'need' will be apparent if you go and read some interviews with harrier pilots over at SLD, it's obvious that you haven't googled - sld interview harrier pilot - yet or you would have found this for a start.
Shaping the Strike Force for Bold Alligator 2012: The Perspective of 2nd MAW | SLDInfo
The F-35 Pilot | SLDInfo
LO, it's strange that you find the interviews at SLD 'funny', I guess you aren't use to reading 1st hand accounts from the forces and prefer pamphlets and journalist's agendas