> The market won't have a say when bureaucrats pass a law mandating every burger or sausage should contain a % of lab-grown meat, with the % increasing every year. If there's anything the recent years have showed is that slippery slope isn't a fallacy.

Sure, but they're currently demonstrating this in the exact opposite way: the market won't have a say when bureaucrats mandate everything has a maximum percentage of lab-grown meat, and that proposed percentage is "zero".