If the law isn't there, people will drive within their ability range. When you've got speed limit, this creates situation that actually presents dangers on the road.
We should never extend our reach beyond our stage of development or set unrealistic goals, nor should we favor form over substance or indulge in showcase projects.
Let's say, I volunteer to give a presentation at school a day before my exam, and now I have no idea how I can prepare for both. I think I've bitten off more than I can chew.