This is wrong, according to the UN's Food and Agriculture Organization, we currently use ~38% of the earths surface for agriculture.[1] Most of that is used for pastor lands. But crops alone are 10%. Now imagine how much of the earth's surface is actually suitable for agriculture and livestock. We use most of the earths surface for ourselves. In fact it's estimated that only 23% of the land on earth, excluding Antartica, is devoted to wildlife.[2]
And about 1/3 of earths surface is deserts. (While they're not devoid of life or agriculture, they provide very little support for flora and fauna compared to most non-desert areas).
We'll be squeezing out pretty much all remaining wildlife in a few hundred years,
[1] https://www.fao.org/sustainability/news/detail/en/c/1274219/ [2] https://theconversation.com/five-maps-that-reveal-the-worlds...