It helps that we’re right. That it can’t be bad to eat what humans have eaten for 2 million years.
But 2 recent things I’ve looked at were studies done a few decades ago and shelved because they didn’t get the “right” answer, but were recovered recently and published showing the lipid hypothesis was wrong and the cause of metabolic disorder was carbohydrates
They were suppressed in the 70s and 80s, now they are published. Dietary guidelines in Australia (one of the biggest wheat exporters) now allow low carb for treating type 2 diabetes.
I do believe we’re watching a change in consensus (which as always is progressing one death at a time - perhaps it’s good that the other side is committed to a metabolically dangerous path)
Beef seems to need much more land and water usage than almost any other food. Since you need land to grow the food for the cattle and land for the cattle. Take the extra methane output which is a potent greenhouse gas. By almost any metric that will be worse for the environment than just growing a food source directly.
Perhaps a chocolate or something takes more water per kg. But many less kg’s will be consumed of chocolate than meat.
https://redtablemeats.com/fresh-meat/beef/how-much-water-is-needed-to-produce-1kg-of-beef/
(I eat beef and other meats periodically).