I don’t think you guys are grasping the crux of the argument—it’s not that lab grown meat is impossible, just that it’s unlikely to become widespread as quickly as needed to strongly mitigate climate change. Seems like a compelling argument to me.
Similar to fusion power—very cool and likely to have important implications someday. But we need to make radical changes in the coming decades, so technology that isn’t close to commercialization today probably won’t save us.