You are missing the point Hector is making.
For a movement to even be a movement, someone MUST take the action, in the face of such highly unfavorable odds.
I am perfectly down with a stark reduction in the production of meat and poultry products, to be consistent with what is realistically feasible to produce without factory and feedlot conditions/practices. To me, that is perfectly justifiable with solid reasoning based on resource utilization and scientific methods.
"DONT EAT ANY MEAT AT ALL! MEAT IS TORTURE" however, is not supportable in such capacities. Its ultimate conclusion is widespread ecosystem destruction in favor of high-density monocropped fields, sustained exclusively to the abuse of nitrogen fertilizers. Such outcomes directly cause the suffering of a diverse cast of complex vertebrate lifeforms, and can even cause extinctions. That harm MUST be considered, if the argument is going to not be hypocritical.
Now then; What is actually lacking (and sorely so) in modern human diets, is leafy greens. With traditional agricultural practices, these are both costly in terms of land acreage required, and with water use. This is why they are not favored agricultural staples, and are instead heavily out-competed by much more productive cereal (and pseudo-cereal) crops, like Wheat, Rye, Barley, Oats, Rice, and Corn.
Recently however, there have been some very nice innovations with automated
vertical farming, which do not have as stringent requirements for land it can be done on (since it is done indoors), and which has been shown to use substantially less water and fertilizer, and-- due to the controlled environment, can be done without the use of herbicides or pesticides. Most specifically, because leafy greens are the easiest crops to adapt to this cultivation methodology.
Re-evaluation of the arguments with this new development can yield scenarios where large agricultural areas can be rewilded, or at the very least, used for grassland pasturage, enabling the secondary use as animal habitat to be conserved, while producing a highly marketable product.