> ... we can certainly replicate them in a lab...
Well, maybe we can. But, for instance, a cow that is finished entirely on pasture--a good deal of its nutritive quality comes from the grasses it eats. Where does that nutrition come from in lab-grown meats? Do we have a source for the exact same nutrients as are provided by air, water, and sunlight and grow easily and freely all over many otherwise unusable bits of land?
Where are the inputs to the lab coming from?
It seems kind of like the lab-grown meat maximalists are thinking that Dow Chemical and its brethren can synthesize all the nutrients that are required and known in, say, beef, and just break out the beakers and Breaking Bad them into existence.
As a long-time software engineer who has a deep respect for complex systems, this is totally insane to me. That the lab-grown meat maximalists think we can supplant this incredibly complex system, from sun to leaf to calf to beef, in some Dow Chemical-inputs and a factory, is absolutely insane.
Remember, from Black Swan by Taleb: Up until the 60s, scientists didn't think that fiber was a useful part of our diet. This lead to the notion that fruit juice was equivalent to whole fruit, from a dietary perspective. This contributed in some part to the obesity epidemic.
The idea that we already do know exactly what makes meat so tasty and healthy is suspect, the idea that we can replicate this exactly like burning CD-ROMs in a meat CD-Burner is just off the wall.