Perhaps he gave it up so he could get the Japanese perspective entered into history. The english sub titles make perfect sense. They were probably added during the interview as I'm sure Fuchida was asked the meanings of things. Why would it not be added to the original report? Did they have a copy available? And why do you get so combative when someone presents comments that oppose your views? You cannot have a conversation if we all agree now can we?
As for giving things away, I gave all my uniforms away except for one set within a year of being out. They didn't mean anything to me but the neighborhood kids liked them for paintball.