Why is this being downvoted? If he isn't "playing dumb" then this is an excellent realization as to the negative impact that tariffs/quotas/etc. have when compared to free trade. True that it is "common knowledge" among those who have studied markets or economics, but not everyone has given these concepts serious thought, and if articles like this lead people to make this connection, I'd say that this is an excellent outcome and don't think commenting on this newfound understanding should be downvoted.