I think that if you lived at altitude, or at extreme latitudes, or in an environment where you had to live more tightly by the seasons, if you saw an animal, one that your peers hunted, you WOULD think to kill and eat it. Especially if you were hungry.
Of course in YOUR comfy western environment, you can pick and choose your diet. But I know one thing, trying to grow fruit year round in northern Europe is unsustainable – it’d carry a massive environmental footprint. I also know that shipping fruit in to such areas year-round from warmer countries is also unsustainable for the same reasons.
And I know that the reason early man ate meat was because herbivores thrived on vegetation in these marginal areas that would be unpalatable to him, but he in turn could eat that herbivore. This turns out to have been quite a good strategy as it fuelled our evolution as a species.