I live in Australia near our mountain pastures. The meat supply is a mix of local grass fed and finished beef and lamb, and grain finished beef from up north
The grass finished meat has a healthier fat balance and tastes better
I always ask butchers where my meat was raised and how it was finished as that affects the ethics and flavour. I agree with you that meat raised on grain is wasteful.
Where’s the waste in what I buy? They drink from mountain streams, they eat grass. Most of their meat goes to human food, most of the rest goes to pet food, the skin becomes leather
When I cook more meat than I can eat, the extra goes in the fridge and I eat it for the next meal
On the relevant subreddit (which hasn’t moved to Lemmy) I have heard it’s easy to get grass finished beef in the US too