I just finished Marcus Luttrell's book "Lone Survivor" last week and they did send a chinook with several SEALs on board in an attempt to rescue Luttrell and his team. That chinook was destroyed by an RPG, killing everyone on board.
I am not saying that all these Seals wouldn’t have been sent to save that one man - I am saying that their policy is not to all be on the same aircraft at the same time.