Not best idea 20MPH limits every where

I have no issue with 20mph round schools at drop off and pick up times but not anywhere else . Just drive through Nairn and you will understand why 20mph on main through fare is ridiculous. One issue is electric cars that make no noise and you are not aware that they are there. There are plenty road crossings in most locations so no need for 20mph limit. Are we turning in to a nanny state. Beter to educate children how to cross the road correctly and safely