I absolutely agree.
Monique Ebell from the National Institute of Economic and Social Research has written a report that compares participation in very comprehensive free trade agreements with membership of an organisation such as the single market, which is pretty much unparalleled in its encouragement of cross-border trade. Being part of a very close free trade arrangement does not give the same access to trade in services or goods as membership of the single market. Even if we had a comprehensive free trade agreement with every country in the world, we would still lose out as a result of Brexit.