One good example is New Zealand. They only have about 2% of arable land and their population was always very small. Even when Europeans started to settle on the islands, overall population didn't grow much. But once Europeans brought grazing animals, NZ population has exploded! Now the islands can support a lot more humans, plus they have enough excess they export to buy plant food they don't grow.

Another example is Scotland. They have 10% of arable land and their population is less than 10% of total UK population. Yet they supply 55% of all beef in the UK and 63% of all lamb. And they still export some meat to EU even after Brexit, even though these exports have fallen drammatically. If you compare the satellite view of Scotland and England, you will see that Scotland is a lot more forests and wild areas, while England is just one large wheat and rape field with a bunch of large cities here and there.

Then there are Alps, which are known for high quality dairy products. Fuck all grows in the mountains so high (in terms of human edible food), yet there are many cows freely grazing and co-existing peacefully with the nature. Just like their wild ancestors did.

P.S. Fun fact - many public parks in UK cities have cattle proof entrances like the one you can see here in Cambridge. Because cows have no issues eating grass which grows in the parks, so you can use this land not only to enjoy your weekend or lunch break, but also to grow food. Here's one in London. And not just in any random part of London, but it's in Richmond, where old rich twats live.

And here's a photo of my brother looking at cows in Richmond. Why pay to mow the grass and for cow feed when you can simply let them graze in a park? Win-win-win!