Not sure, if author saw the theme on today's standard - higher resolution screen or some bigger screen at all.

The content covers just left half of a web space aligned to the left side. It looks horrible like default WP theme 2019.

I can understand the width of these themes, however I have no idea why they align whole content left in this case. It looks clunky, like something is missing on the right side.

Probably I miss something regarding these designs.