They've done this before "Even Richard Nixon saw that...". Can't discount 99% of what someone says and claim that other 1% is where they must have been "correct".
JFK had extensive taping systems in the White House, in another 10 years we "may" be priviledged enough to hear them. LBJ had tapes made during the White House too (and they don't flatter him, they reference all sorts of shady business practices).