A knighthood is simply an inappropriate award in this situation.
Being an active part of HM forces no matter what operation one was on is not a matter for a knighthood, that is simply the wrong gong. Besides, he has evidently been decorated, and well decorated for the part he played already. Merely passing the lottery of life to be the last remaining man on his op is even less qualification for an award, let alone one as exalted as a knighthood
If what he did deserves a knighthood today he deserved it just as much in 1944. It follows, then, that every man-jack that served with him did too. If they were not so knighted than why should he be?
Are we really in a position, morally, logically or legally to start dishing out the highest awards to old soldiers merely because they have lived a long life? Do we make value judgements on which of these old boys we decorate? Why? Because one was involved in a high-profile op and another wasn't? This makes a mockery of the entire concept of medals and awards and is a travesty on several levels.
The fragrant Gp Captain has overstepped the mark with her enthusiasm on this occasion, and it is not to the betterment of the nation, the soldier to whom is inappropriately directed, his oppos who didn't have the luck of such long life or any other surviving soldier of that war.
I'd be surprised if he, and they, didn't agree.