"the plane would have been difficult to land with only one pilot at the controls"
"You could, I gather, land a 777 single-handed - but it would require a lot of effort ...
Yes, high workload but most modern aeroplanes are pretty easy to land on your own. We are all trained for it.
I wonder if the risk of having to guys over 60 is an worse than the risk of having only 2 engines?