If you're right, that would maybe be cool (but then we'd have to consider the inputs to the factories, which'd probably be GMO soybeans and corn, which means we're harming other animals in the process of producing them), but I believe your statement is full of hubris.

Wild nature doesn't provide very much that is edible by humans, and certainly not enough to sustain a civilization of humans rather than small bands of roving nomads.

Nature doesn't care about us, it won't help us, if left to its own devices it would eventually wipe humanity out entirely. We're well, well past the point where we can rely on nature to care for itself or for us. If we don't all take the initiative to intervene and engineer nature for its and our benefit, then only those with hubris will do so.

Regarding the hubris of believing that a lab-grown steak could be better than the real thing, physics doesn't change just because it's inside of an animal, so there's no reason to think that we won't eventually be able to engineer muscle tissues that are indistinguishable from real grass-fed beef, given the time and money to do so.

While I can easily believe most specific individual humans could (with skill and training) get a good meal after a few hours spent foraging if considered separately, that is very different from saying that all of the population can be fed that way at the same time.

The carrying capacity of the planet if we’re “in tune with nature” is the pre-farming population, because even neolithic farms were very unnatural things.

And then you have all of the seasoning, for example KFC’s “secret” herbs and spices are from basically all over the planet.