Do you really think that crops pollinate themselves? That plants we rely on for clean air fertilise their own ground?

Just for an example - many plants you like (well, as a side to your meat anyway, heh) are fertilised using Guano, which is just bat shit. Bats eat insects, for the most part. Insects thrive on pollen, saps, roots, fruit and flowers and so on. From here on out, requirements grow exponentially. It’s called eco „system“ for a reason.

If you really have the hubris to think humanity and a few cattle could survive just fine, it merely shows a lack of understanding.