Nice to hear both sides of the cow size debate. In our area smaller cows don't seem to consistently produce it wears them down quicker and the supersize cows do fine but typically won't raise a big enough calf to pay for keeping her around. Also the market for short legged stout cattle is disappointing. We shipped a beautiful 450 lb steer or at least I thought it was a good one lol, and as it went through the sale ring the auctioneer couldn't get a bid. At dinner break I asked the manager what was wrong with that calf it was perfectly healthy. So we went out back to look at him and he said the market is tough right now and he said it was just too small short and wouldn't finish at a big enough weight. Ended up settling on a price for him but that made me reconsider what kind of bulls to use. Some areas there might be demand for smaller calves but here I know where my pay check comes from so u gotta raise what there's demand for.
I agree with finding the most efficient cow and easyfleshing and keeping cow size under control but u have to keep in mind what buyers want and what pays best for them to feed and finish. Hence the need to find AI bulls that raise calves that fit the market here.