This reads as a kneejerk reaction to the mention of GMO as if the person you responded to has an agenda. I think their point is that we need to be aware of what is natural (aka tested to equilibrium over huge periods of time) and what is artificial (propped up by human practices on the relatively short timescale of centuries and millenia).

It seems the baseline drifts and we could stand to take certain environmental cycles and/or livestock lifecycles for granted as though they exist purely through evolution or untouched ecological processes.