Pretty sure the parent comment was suggesting that. Hé even said “it’s what vegetarians do”.

Cows raised for beef are almost always fed corn and soy in feedlots, not let out to pasture to graze on grass.

Indeed, it’s a shame since grass-fed tastes much better and is more environmentally friendly.

Either way, we can’t just “eat what the cows eat” directly and there are a lot more variables to consider.