I tend to find it goes the opposite way to much myself. Yes I believe we have to recognize structural issues, but its a market show. In a market show we are supposed to be judging the animals as if they are going to hang on the rail that day, in that situation product and market readiness(finish) are the most important traits to look for. In fact I just had a committe member for a fairly large county fair call me to get me to submit my information and price to judge their show next yr. One of their concerns with past judges is that they tend to value stucture and style over product to much. Their issue is that their carcass contest is always completely backwards from the live show. Understanding that we will never completely match live evaluation with the rail, there is concern when the 2 are so far apart. In judging a market show we are supposed to be selecting the calf that we think is most likely to hang the best carcass on the rail. When they evaluate on the rail they arent in the least concerned with how that calf walked or how stylish he was, I am not saying we should throw structure and style completely out of show ring, but when they arent a factor at all on the rail, then they shouldnt be very high on our priority list in the show ring.
Beyond that, using a finished steer that was fed for show or in the feedlot to determine possible structure issues in his mama and sisters is kinda like comparing apples to oranges, yes they are both fruit and both grow on trees, beyond that the environment and methods that get them to us are fairly different. I would never expect a heifer the same frame size and age as the steers in my barn to carry near the body mass and weight that my steers are, when ideally I not only expect my steers to do that I would love for them to have more. We affect that by castrating the steers and taking away hormones which affects metabolism and how they use feed, we also tend to push a lot hotter feed to steers. We push steers to be 1300+ pounds, finished, and ready for market long before they mature skeletally. All of that can have negative impacts on structural soundness. While if heifers are fed properly to be replacement females we are going to support skeletal soundness and maturity above all else. So saying that a steer that is post legged or tight strided or pops a little when he is 14-15 months old, over 1300 pounds and no where near to skeletally mature is going to mean that his contemporary heifers will have the same issues is not a very sound advice, b/c hopefully if those contemporary heifers are being raised as replacements then they havent been raised in nearly the same manner.