I wonder what the relative roles of Johnson or Gove were in forming a view that the public could swallow. As a journalist, Gove appalled me. As a politician, his views on a range of issues do not attract me - though I think his efforts to reform the Justice system were admirable.
As a leading Leave campaigner, I'd put him in the same basket of truth benders as a number of others on both sides. His comment on experts wasn't that short of reality but he made the mistake of not being more precise ... but being precise would have limited its value as a vote winning sound bite, I guess.
Unlike an oncologist, mechanic, baker or battle hardened admiral, until the deal is agreed, (to me) there can be no experts only informed commentators.