I provide a study from the National Library of Medicine. This study provides a nuanced view of the topic here, and provides a lot of data.
If you did read the scientific study I linked to, then you would now know that land that "food animals" occupy is often not at all suited for other forms of agriculture.
You would also know that various food animals can be fed and raised on waste from other agricultural processes that humans could not consume.
That is why I stated "It is more complicated than what the original soundbite line portrayed it as.
Does that help?