Some British chef wants to outlaw out-of-season vegetables. Besides this being extremmely funny, it's of course stupid. Let's compare this to some hypothetical situations, in order to better understand just why is this so stupid.
First, let's assume some "celebrity" fashion designer decides they want to outlaw out-of-season or out-of-fashion clothes. I guess nobody is going to pass such a law (in a serious country in this timeframe), but just the idea of lobbying for something like this is preposterous. Imagine stores being unable to sell ... t-shirts in winter. Imagine yourself not being allowed to... I don't know, wear a blue hat because it's unfashionable and thus illegal.
Let's imagine then, that some "celebrity" "deejay" decides to lobby for a law banning songs and records that are more than 3 years old. So then I go to the usual rock bars and I'm not able to listen to 80's rock because some idiot passed a law that some other idiot lobbied for.
Then, let's imagine that some "celebrity" porn star bans you from having sex in other ways than the missionary position (a real law in some USA state).
Finally, let's imagine that some celebrity electonic circuit designer bans electrolytic capacitors, which they should actually do, as electrolytic capacitors currently suck balls and are a main cause of appliance failure. That would be extremmely stupid, because electrolytic capacitors, though unreliable, are very small and cannot be replaced with some other type without ending up with for example a mobile phone the size of a bucket.