Architects that don't understand how to do the fundamentals of implementing the designs they make tend to make unrealistic designs, that are expensive to implement and may look pretty, but function poorly for the owners and occupants.
This applies to architects of buildings, architects of software, and architects of hardware. Probably to most high level design and supervision type positions.
Edit to add: many of the best architects of buildings are able to do amazing things specifically because they've studied the fundamentals and are able to do innovative things with materials. Of course, time will tell it the innovation worked out well or not.
waaaaat? That is completely utterly 100% unreasonable. Unless you mean that you expect every adult member of society to do those things?
And I'm not saying that everyone needs to do everyone's jobs. But you shoupd be able yo do at least a bumbling job of the layers of abstraction you work on top of if you want to make a decision in how those things should work.