Once again...a not so great use of the words "common sense".
Common sense = education plus experience (comes from/is developed by/etc)
If you have a shortage of either....you could be at risk. It's good to formalize issues like this, in the form of study/article...etc. Those without the experience (who can read) can go about "getting" that experience in a whole lot safer way. (after a good read)
Add this....accidents in almost any kind of activity like riding....statistically come at the beginning of the riding experience....or after a person has ridden many, many miles. Yep....those new riders who are clueless....and those older riders who take things for granted. It's great for both groups to have things that remind them about how to stay safe. In the new rider group, encouragement to add experience in a measured way....and for the vets....frequent review of the basics so we can stay on top of our ballgame.