And if you wash your car every day it looks clean, but it's a pain to do it!

What you are describing is a form of tagging for the renderer. We are not in the business of making a pretty map. We are assembling geographic data that can be used by anyone, for free, to make a map that suits their needs. By connecting landuse to roads, you are contributing incorrect data (because you are suggesting that roadbed is actually commercial/park/retail) and making it very difficult to edit.

What looks clean is subjective. What's easiest to map, less so. Do not continue mapping in this way.