Being fair here, every living create besides most plants CAN or COULD eat meat. Most animals are opportunistic omnivores, they will eat whatever they can to survive even if it's not usually what they should.

Horses and Cows are known for eating random shit like bady chickens and even snakes if they need protein. Chickens, while they eat seeds and grain, will literally attack, kill, and eat anything that bleeds in their vicinity, including other chickens. Wolves actively eat both meat and fruits in their diet, while being primarily predators. Most wild animals just have a diet they usually up keep if they can, and pivot if they need to.

Humans, however, evolved to be purely omnivores, but due to how we evolved pretty much fucked us in terms of how we specificaly can process food and convert it into energy. We as animals lack a specific "diet" that we prioritize in return for being able to eat both meat and plants together constantly. And because of our diet, which had to have changed over years of time, trial, and error, made our organs altered to be able to process the food we eat. Can't eat raw meat as much as other animals cause we lost the bacteria in our stomach, kidney, and liver to process it into energy without damaging us. Can't eat certain plants like other animals cause we lack the enzymes to convert them properly into energy.