That seems a bit harsh given that he wasn't directly involved in the trafficking. Was he a facilitator? Sure, but most drug trafficking is facilitated through systems that are considered legal: post office, google searches, emails, medicine labs, etc. Yet, why is the moderator of a platform the one who has to pay the biggest price?
So considering that, yes, his punishment far exceeds his involvement in the illegal activity. The punishment should've been shared by the dozen, if not hundreds, of other parties/groups/dynamics involved. History has proved that killing the platform doesn't fix the problem.