That link had nothing to do with economic opinions.
It is discussing third country status rules that have to be applied as a result of no deal.
Context: Earlier, the French Embassy tweeted out a fact-sheet on what UK plant and animal product exporters will have to do in order to bring their goods into the EU.
It's a procedure including paperwork and at-border vet checks.
The very definition of a non-tariff barrier.
3/ There's nothing surprising in this document. The French are planning to apply to the UK the same checks and obligations as they do to any 3rd country supplier