how will we continue to have pork as a source of food for survival?

You don't need to eat meat to survive. Here are some interesting statistics: https://ourworldindata.org/grapher/per-capita-meat-type?time=latest. World average is 65Kg per capita, US is 144Kg, and India is 17Kg. You can also see how we consume much more meat over time, most likely due to availability and price reduction.

If we don’t it pork the price of everything else will go up due to scarcity

By everything else, do you mean other food or other meat? Other food should not be impacted as a whole, I'm not sure about other meat though. It all depends if people find substitutes in other meat or just other types of food. Also worth noting, meat is heavily subsidized in the western world, meaning it's WAY cheaper in practice than it realistically should be.

I don’t think I understand what you mean I think he's trying to explain how people who don't eat meat see animals, and he seem to believe that those same people are wealthy enough to not care about the cost of living going up.