Because it is functionality they really need for other (legit!) reasons, and since trying to turn it into an anti-adblock technology would be a PR and regulator

Because it is functionality they really need for other (legit!) reasons, and since trying to turn it into an anti-adblock technology would be a PR and regulatory nightmare, and make it harder to ship for the uses they actually need it for. Lying tends to be stupid, especially for a company under so much scrutiny.