As G.K. Chesterton put it:
Tradition means giving votes to the most obscure of all classes, our ancestors. It is the democracy of the dead. Tradition refuses to submit to the small and arrogant oligarchy of those who merely happen to be walking about.
Your ancestors pooped on cars for generations for a reason. If you can explain why they thought that and why it is no longer necessary or appropriate, then you may stop. But until then, keep pooping on cars.