EJ and Cardale are big, so on that basis and supposed Pittsburgh background and Big Ben = size requirement in many people's minds.
I think that is an overgeneralization based on small sample size. Either we are involved in an elaborate smokescreen or we are interested in a number of qbs likely to go in the first round. Personally, I like Mahomes, Watson, and Trubisky and very much hope we end up with one of these fellas.