Like the Greeks adding a visual element to enhance the appearance of strength, I think the curved pylons, rather than serving a functional purpose, are designed to, if subconsciously, give the appearance of strength by mimicking architectural forms. In this case, the curve of an arch.
I think it's possible that even Ryan Church
subconciously gave that "upside-down arch" proportions that are similar to classic roman pointed arches.
The romans didn't "invent" those visual pleasing proportions, but rather they used those proportions because they are inherently visually pleasing. It's a chicken-and-the-egg issue.
I think Ryans Church's designed an arch-shape that had visually pleaseing proportions, and that arch happened to look like a roman pointed arch because those Roman designers also used visually pleasing propportions.