So they go through the feedlots but most cattle are not in the feedlot at once (feedlots are a smaller part of the time a cow is alive, some months only).

The largest number of cattle, currently, if you counted them all up, are still on pasture.

Not that this detracts from your point, mostly a minor semantic quibble.

I think it's a pretty huge point that's overlooked, not just a quibble.

If a group of kids were fed healthy, home-made meals all week and then get a piece of chocolate cake on Sunday night, it's clearly misleading to say "100% of these children were raised on chocolate cake!".