Not here to shit on anyone's beliefs but the story is not as simple as the numbers suggest. Factory farming is problematic for sure, but of the global calorie supply numbers you are looking at for example, 80% of it is non-human edible food stuffs and by-products that we feed to livestock to obtain dairy and meat. It is not a simple case of replacing these crops with human edible crops, farming generally doesn't work like that. The 77% agricultural land statistic that you're seeing includes a vast amount of land that is not arable, as in it cannot be used to grow crops and instead is put to use in feeding livestock instead. Another common misconception (not pictured here) is that livestock consume far too much fresh water reserves, but over 50% of all fresh water goes towards just rice, wheat and cotton crops.
This is a meme obviously so I don't want to get too dense or argumentative, but check out the below video if you are interested in clearing up some commonly held misconceptions regarding livestock and meat.
Efficiency (i.imgur.com)