I find your thinking a little provincial
No, I'm not dismissing the dire predictions as a possibility, but I am dismissing them as a certainty. I'm not a great fan of many aspects of capitalism, but it is efficient at finding solutions to business problems. One solution may be the worst case of business shutting/leaving, but I don't trust the opinion on this of anyone who is clearly just cherry picking doomsday scenarios to support their remain position. I could make equally unrealistic arguments that the difficulty of post brexit import/exports would cause a spectacular growth of internal UK markets and industry to neatly support my leave preference.