Engineering is synthesis (evaluation of design options).   One particular framing system is chosen not because it is the truth, but because it is as close as the designer can get.   That is enough to discover that one system is better than another. You see, structural design is really not objective, not close. There really isn’t one answer; there never has been. The problem is that design is perceived that way and has an objective truth assigned to it.  Once you abolish this misconception, the creative possibilities are limitless.   See my article "Twilight of the Idols" in Modern Steel Construction Magazine for more on synthesis and an example design problem.