Well, I did not say that ruminants aren't a part of regenerative agriculture. There's just not that many to support the current meat consumption levels.

If you're going to grow ruminants just on grass, it takes a lot of time and land to eventually sell the meat compared to what's happening now.

We could argue that a reduction from 100+ kg to 4-30kg of meat per capita per year could be supported this way but I have no idea.