As another poster has already said, becoming predators was an absolutely necessary stage for humans to become as intelligent as they are now, so we cannot regret it or wish that it has not happened.

Even many of the people who abhor the most to see the death of other animals cannot abstain to admire the beauty of the actions of top predators like tigers/jaguars or octopuses.

Nevertheless, now we are approaching quickly the moment when killing other animals in order to use their body for food or for producing various useful substances is no longer needed, so we should stop this as soon as it becomes possible.

Unfortunately we still need some technological developments for this to become feasible everywhere.

I would like to be completely vegan, but for now there still exist 2 food ingredients of animal origin that I consume, because any equivalent vegan alternatives for them are much more expensive than I can afford.

However, the bulk of the food, which provides most of the energy, can already be restricted to non-animal origins, for everyone, everywhere.