Facebook's legal team is not in charge of their ethics, the CEO is, and the CEO determines what gets posted. The legal team serves at the pleasure of the CEO and they're free to hire a lawyer that would come up with language more in line of what the CEO desires. So you can take it to the bank that just like the legal team vetted the text the CEO in turn vetted the legal team and they are operating under some kind of mandate.

"Vet" implies they're ensuring it's true.

Instead Facebook is publishing PR that does more to mislead than inform.

And they're doing it with simple language that makes it appear they're being open and honest when they're actually hiding the important bits in order to deceive.