Funky_monks
Neo-Rustic
You do understand that what gets shat out of the back of the animal is full of those in a highly available form for plant growth, don't you?If there were, as you say, no way for plants to continue growing in the same soil indefinitely, then all plants would be dead by now and all soil barren. For ninety-nine point all the nines you like percent of earth's history there were no artificial fertilisers, and yet plants continued existing.
You did not say growing crops, or growing monocultures, you said growing plants intrinsically depletes soil fertilify. That statement was false. And not just because that's not what 'intrinsically' means.
I was once like you. I understood how agriculture worked, and I used this to make excuses for continuing to eat meat. It wasn't valid then and it's not valid now. For all sorts of reasons, but the main one being thermodynamics. Anything bad about growing crops is the same but ten times worse if you're talking about meat production because, and stop me if I'm going too fast for you here, you have to grow crops to feed animals. So more potassium, more nitrates, more water, more everything. Because most of what you put into an animal gets shat out the back of it long before you can get the grill warmed up.
Plants and animals have evolved side by side.
Oddly, I used to know some lawyers with about 20 ac of grass (mixed grassland, not a monoculture), who had been taking hay off it for about 5 years - leave grass to grow, cut and bale, was all they ever did.
Unsurprisingly the hay got less and less, growth was minimal it started to burn off in the summer.
Grazed it off in winter for a couple of years with sheep, and was restored.
Probably over simplistic, could probably have done with some lime too, but there ya go.