IMO, line up dots are a personal choice for many folks. For the big manufacturing rod companies it's likely an added cost which they don't wish to have. Some anglers like them, while others hate them.......not sure why?
I prefer to place them on all of the custom rods I build (unless a customer wishes not to have them), for they can be done in many variations other than painted dots on a rod blank. On a custom built rod, I feel they add an extra touch of individuality.
Mine are usually done in the form of a pair of feather inlays using Jungle Cock eye feathers indicating the dots. When properly finished, they are not only functional in quick rod blank alignment, but can be quite an eye catching attraction to a beautiful fishing rod.
Once again though, it's a personal choice much the same as having a hook keeper on a rod.