As long as one eats meat produced by the usual Western factory farm production, pretty much all of the criticism of meat consumption is true.
If one eats from a local system in which animals are kept in harmony with the rest of the system, pretty nearly none of it is. It is possible to feed humans on less area less destructively if those people are omnivores because the animals convert many parts of the ecosystem to human-usable food.
None of this applies to food one might normally buy in a grocery store, however. That’s almost entirely factory farmed. However, it does become relevant as we look for solutions. Home gardens and small systems work better with animals incorporated. Larger systems do too, in the infrequent case that they are operated regeneratively instead of destructively.
The large change that we need to make will not be principally driven by people giving up meat or eggs or milk voluntarily. It is also not likely to be resolved in any rewarding way by removing human population. It must, therefore, be driven by a change of method.