There are plenty of Pokemon Connoisseurs that are not chefs, but they still speak that way nonetheless.

[... So it's not really much of a factor stopping people from talking in food puns anyway.]

Of course, we all have our own unique spin to it too, despite that. After all, the way I might describe something's taste might be different in comparison to how another would describe it, due to their own personal feelings or abilities as a connoisseur.