When I was studying special relativity one of the things which caught my attention was how, because the speed of light was a constant, you could just set it to . Setting c equal to 1 caused space and time to have the same units. One nanosecond is slightly less than to one foot. The Lorentz Equation is beautiful when written with .
I started designing a system of absolute units. My system would be elegant. No more would humanity's perspective be shackled by our pre-relativistic Dark Age units of measurement.
About halfway through the design process I realized I was designing a bad system. My units were impractical. Not (just) because of the coordination problems required to actually get everyone to change units. Not (just) because Plank's Constant is over thirty orders of magnitude shorter than the distances we use for everyday tasks. My system was fundamentally broken because the inelegant space-time non-equivalence of real-world units is a feature, not a bug.
Suppose we used the same units for time as for distance. Meters are replaced with nanoseconds. If I say something is "fifteen minutes away" it's no longer obvious whether I'm talking about a fifteen-minutes of time or the distance from the Earth to the Sun and back again. Usually whether I am discussing space or time can be inferred, but inference shouldn't be necessary. The purpose of language is to communicate effectively the first time. A little bit of redundancy improves communication.
The world is a complex place. The reason things are the way they are is often non-obvious. That's why if you propose a change to the world then the burden of proof is on you to fill in all of the burdensome details.
I think the burden of worldbuilding is why the philosophy in science fiction tends to be so good. Science fiction authors are required to worldbuild which forces their ideas to be somewhat grounded in reality.