Livestock has been raised in Europe for Millenia with no soy anywhere near them. Grass grazed cattle & chickens are completely sustainable and beneficial to the environment they're on. Sourced locally they're a fuckton healthier and less polluting than shipping soy and avocados across the planet.

Monocrops are terrible for the planet & wildlife, and are only even viable due to heavy use of pesticides & NPK fertliser.

Organic farming requires large amounts of animal manure to work, guess where it comes from?

Please go read about regenerative agriculture - that's the way forward.