It can’t be a flawed argument if it reflects reality. So if we accept Meta’s information to be accurate, then they’re just stating a fact. FB users don’t care about news articles, so attempts to wring money out of a third party isn’t going to work, as we can see here.
I’ve always been dubious of the “you should pay us to send us traffic” stance that news organizations seem to take every 5 or so years. It never works out.