Not when you eat the animals that eat corpses afterwards. That's how you spread diseases, plus when animals eat human flesh, they leave bits floating in the water supply.

We bury people for a reason. Or we burn them, or leave them on the land to get eaten by animals, away from water supplies. (https://en.wikipedia.org/wiki/Sky_burial)

The difference between what you're proposing is the difference between composting an animal corpse and then using it to fertilize your crops, or just grinding it up and spraying it all over your tomatoes.