[akira2501]

Human processes are imprecise. Our language just reflects this. You could improve the language to the point that no one would use it, but this wouldn't have any actual impact on the "issue."

Take, for example, the way people actually use SI. The distance to the sun, most accurately is "93 gigameters." Yet, everyone says "93 million km." Why?

If you're just going to drop the accuracy, then you should switch bases to reflect this; however, people want language that matches their everyday experiences and not one that conveys a lot of additional information through the units themselves.

Language is a tool to express ourselves, not to constrain our expressions.