> The exporters aren't impacted directly at all
This isn't true, at least if you believe in standard economic theory (not believing standard economic theory is what got us in this mess!).
The issue is that the tariff increases the effective price to the consumer, so it shifts the demand curve downward by the cost of the tariff (the price consumers are willing to pay the producer for a given quantity of goods).
Markets always find their equilibrium, and the resulting equilibrium point is a lower transaction price and lower quantity than before. Quantifying the shift requires knowing both the supply and demand elasticities.
In other words, both the producer and consumer share the burden of the tariffs. The producer receives less from the consumer, and the consumer pays a higher total cost than before. Who pays more of the tariff is question that we again need the elasticities to answer.