People Are Increasingly Cutting Back on Meat and Animal Products, But Not Necessarily Giving Up All Meat. Going plant-based doesn't have to be an all-or-nothing way of eating. Overall, more people are eating fewer animal products and more whole plant foods — which can be great steps for health and for the environment
The species "Man" evolved to be omnivorous. Insects, grubs, dead or easily caught & killed animals, leaves, fruit, roots, seeds, ....
As intelligence expanded, and fire became used, man's range of diet expanded by cooking previously indigestible foods.
Whilst it is possible to restrict one's dietary range, it is better to utilise the entire range available - with moderation.
(Sounds like a sex-advice manual)