...and football games, and shopping, and pretty much everything else in life. Some wish to impose their interpretation of general principles on other Christians in many areas of life (beards, bedmaking, etc.); others are content to leave more to the consciences of individual believers. Every institution will have some rules and other areas where it may provide instruction but allow for more variation in practices. It seems reasonable for seminaries to make their own determination of whether there is a problem, and if there is, to proceed accordingly. Personally, I'm not convinced that requiring suits and ties would raise the personal godliness of our students and prefer to reserve my (limited) influence on their thinking to other more pertinent areas of sanctification, but I understand that you have a different opinion, and if you founded a seminary, it would look very different from the ones where I have chosen to work.