The Fed said the same thing, but it doesn't make any sense as a question. M2 doesn't include large denomination deposits, institutional money funds, etc. Saying M3 doesn't matter because we know M2 would be like saying we don't care about the Atlantic ocean because we have a good idea of what the Mississippi river is like.
Hiding M3 lets them cook the books and get away with it much more easily than if they published the numbers.
You can't get large denomination deposits and institutional money funds from somewhere else? What is it about large denomination deposits and institutional money funds that allows the Fed to cook the books?