I know that we're going a little off topic, but without events like The Ludlow Food Festival, then IMO the fabric of UK country life would be much poorer.
If we were to follow your argument through, then exactly the same accusation could be leveled at the Smallholders Festival at Builth Wells and just about every other event held up and down the length and breadth of the country. They're informative and interesting but they're also shop windows for people to buy and sell through.