Even an SLF can work out that if he HAS to land he can land and he is in the clear! Even an SLF can understand that if he lands in contravention of SOP's he could end up walking home. Assumptions of a computer glitch are just that .. assumptions. Apollo 13 Mission Control assumed they had a computer glitch ... so I believe did Air Transat. And that's not to mention Sod's Law which would probably have seen him ignore the computer warning and find a bird right where it shouldn't have been ... thus not putting a nail in a career but positively screwing down the lid ....