Not at all. There have been generations of people who worked on farms and factories providing meat for humans to eat. Before than we hunted and raised, killed and stored our own meat. We still go to wars even knowing what it looks like to kill other humans, and now we don't even have to go to war face to face.
The only thing that will cause the world's population to go vegetarian, if for there to be a global die off of all animals that we as humans use as food, including most animals that we don't normally think of as food. Grant this would have to be a sudden, almost overnight sort of disaster, which in turn would pretty much take most of the world's human population with it, due to the wars that will be fought over the then limited plant food supplies. And along with this, something would have to happen to our ability to keep any of the currently processed and stored meat that is on hand today.