So? The first response should always be to take folks seriously. Always. Even if they are really searching for opioids. No doctor should assume folks are lying upfront.
Even if that means that a couple people are getting off work when they don't need it. And I'd much rather have a disability system that occasionally gives the wrong people benefits than to withhold benefits from someone and make their life torturous. Much like theft an loss are costs of retail, this should be the cost of a disability system: A few folks take advantage.