To be quite blunt; what is pointless about talking about football fields?

You sound a bit sensitive to me there, Bert. Mine was a new suggestion rather than a reply to you. Your argument would only register a few milliCats on the pointless scale. ;-)

But seriously, just as imperial and US gallons are different sizes, a soccer field is around 1/3 as big again as an American football field. That is one of the problems of non-SI units of measurement; - apparently similar measurements can mean different things to different people.

DC