People involved in the opioid crisis pushed unnecessary and extremely addictive drugs onto unsuspecting people who trusted them with their care, and it was all done through very intentional deception, lies about how these drugs weren't addictive when they absolutely knew that they were, and through corruption by offering doctors kickbacks for getting people hooked on them.

Ignoring everything else, do you really fail to see how bribing doctor to lie to people about the nature of highly addictive drugs is different from a consensual transaction between two adults?