(Implied) invalid generalization, or confirmation bias. This is a good reason to not eat that particular meat. In general, however, meat is an S-tier source of nutrition, vitamins, and minerals.
What you say is maybe true but irrelevant. We don't have to grow grass.
Abstractly, using land for crops is around an order of magnitude more efficient when considering only calories per unit area, but when considering the total system i.e the humans consuming it, there's an argument to be had that more livestock could be more efficient when considering all the side effects of a huge population of malnourished humans overeating refined hyper-paletable carbs.
For either side of this argument, the real issue is industrial agriculture producing both crops and livestock in unsustainable and nutritionally devoid ways, that are incredibly bad for the environment and humans consuming it.
I don't want to ban you because you've also posted good things, but we badly need you to fix this. We've already asked you once (https://news.ycombinator.com/item?id=44751806).
If you'd please review https://news.ycombinator.com/newsguidelines.html and stick to the rules when posting here, we'd appreciate it.