I suspect galaxy distances are not very precise to begin with.

For example, the distance to the nearest galaxy: "The team refined the uncertainty in the distance to the LMC down to 2.2 percent." [1]

This kind of precision could be used for example to measure the radius of elementary particles (wild guess, I'm not even sure that makes sense given what we know about the quantum world)

[1] http://obs.carnegiescience.edu/content/distance-nearest-gala...