Why does everyone expect Head coaches to be like Presidents?

These guys have one of, if not THE most cut-throat jobs in the world. Universities fire them at the drop of a hat...look at Sherman getting canned by A&M 1 year after they had their best season in a decade. It's great that Les is a great guy and can get results but I don't fault Saban for being a control freak workaholic and don't think he needs to kiss babies and glad-hand. I also don't blame them for striking while the iron is hot and their stock is high and bailing for a better job...the universities would dump them just as quickly if things aren't going well. Hell, most of the Rant wanted to fire Miles after 2008, when he had lost a tremendous amount of talent and was starting herp and derp at QB. I don't get it.