This is a great video. This architectural style, most common in the Midwestern is usually marked by horizontal lines, flat or hipped roofs with broad overhanging eaves, windows grouped in horizontal bands, integration with the landscape, craftsmanship, and use of ornaments. This movement was an attempt to create a style in symphony with the design and aesthetics of the Arts and Craft Movement.
I keep trying to see greatness in new Architecture in a Major U.S. city I live just outside of. But even some of the most striking new buildings look as though a computer designed them with way too much Repetition of pattern. Nothing Earthy nor organic in nature in the Spirit of Frank Lloyd Wright and others from his era. In my opinion with the craze about Solar etc every structure needs to be designed with far reaching over hangs blocking the high Summer sun from entering windows while allowing the low Winter Sun to beam in. Why is not every structure built in this way. Also this protects the exterior from wasteful rotting and decay of sidings, paint, etc from intense Sun and Rain. It’s really a no brainer.
My answer to your "why not -" question is that it takes not only understanding but also talent to produce buildings like the ones shown and that, unfortunately, comes at a premium that seldom exists by nature in those who choose to be architects.They, unfortunately would rather follow that latest "fashion" covered in magazines than to apply the functional elements that function so well in the natural environment. You have to seek out those who continue to produce designs that become treasures. They are a very small portion of those who call themselves "architect".
