That's just architects in a nutshell, and stems from the division of labor. They're primarily tasked with designing a grand vision, and because of that, aesthetics and features naturally end up being primary concerns they deal with (ie the "what" and "why"). Whereas engineers are tasked more about figuring out the details, the how, and ensuring that vision can actually be built, so naturally... practicality ends up being a primary concern of theirs, since they tend to have to deal with it more.

That's not to say that architects don't or can't make practicality their primary concern, just that things naturally slant this way since this is typically how labor is divided.