To be fair, they do need an alternate with a better visibility. But if the computers are not working, you're not in for a good time in a modern airliner anyway.
Maybe not a 'good time', but a safe one.
Commercial airliners have standby instruments and a VHF radio that works on a battery. Which is all you need to get it on the ground in one piece.
You cannot operate fly-by-wire aircraft without computers, that's what I meant. Redundancy is name of the game, I see no problem in using cameras if they're made redundant.
