Why is that laughable? If the company wants to be receptive to its critics isn't it reasonable for them to create such a role?
Partners have walked from billions of dollars in shares, its former concience, Alex Stamos, quit after being repeatedly blocked, stymied, subverted, undermined, or backstabbed. And the very label "VP of Integrity" reads as so perfectly Orwellian and ironic that the position negates itself.
Without an ability to fully rope in Zuck directly it is every bit as toothless as it sounds.
Further more just because the role exists doesn't mean it matters. My Org has all sorts of diversity and sustainability managers, and their relevance ends the moment business decisions come into play.