From the email: "We know your privacy is important"
Airbnb should prove it by making this opt-in instead of opt-out (and not hiding the choice with a bunch of boilerplate). I expect these dark patterns from a shadier website, not Airbnb.
Edit: If you go through "Account settings" you are only given a choice to "deactivate" your account. To actually remove your information, go here: https://www.airbnb.com/privacy/manage-your-data