It's flexible conduit, used to save time. Solid conduit (as up near the ceiling to the very right side of the picture) would be a bit harder to form to the required shape. I'm not a professional, but the only place I've seen it installed by one is where one end or the other might have to flex a little bit. Like from wall to oven or range (hidden wiring) or in my case to a 220V 30-amp-start air compressor. 40-50 years ago it was used more, I believe. I agree it does not look great.