Other animals hunt other animals, and the ecosystem ends up in a sustainable equilibrium. Humans, however, get most of their meat from industrial agriculture, which is an extractive system that drains water tables and pumps carbon dioxide into the atmosphere.
That's very definitely an ethical problem that we have manufactured.
This is not some simple ethical equation with a Pollyanna answer.
And your sharp looking clothes are far more wasteful than a peasant shirt and plain shorts.
And your smart phone is far more wasteful than a basic phone.
And a house with a yard is vastly more wasteful than a 150 sqft per person apartment.
And do you know how much wastage occurred to make that movie you watched? Or that TV show you like?
Everything can be considered wasteful by comparison. It comes down to balancing your needs/wants with energy requirements, and choosing which causes to bring up when preaching your moral superiority.
But regardless, this is what I mean by choosing which causes to bring up when preaching your moral superiority.
The level of meat consumption in rich countries is unjustifiable.