Other than the assertion it's actually worse for the environment than cow farts (but not J-Man farts), I tend to agree with you.[Putting on my Libertarian hat]
Why should the state have the ability to ban a product as long as that product haven't been determined to cause harm? Let the free market decide if people want to eat 'lab grown' meat. Maybe the law should have simply mandated food labels to make it clear where the 'meat' came from instead of banning it.
[/Putting on my Libertarian hat]