Generally, those who say things like "long live common sense", have no idea what common sense even is.
Common sense is knowledge already acquired and internalized.
Which takes us right back to the question of what we should learn, how to acquire that knowledge, and how to internalize it.
"Listen to me because I am old" is the traditional way, and it is not a teaching method I would approve of (or use, when I am instructing something).
It is rather sad when people can not tell the difference between risk assessment methods on the one hand, and muppets running around in yellow vests on the other hand. And perhaps more significantly, the difference between muppets running around in yellow vests and muppets trying to make others run around in yellow vests. Good judgment is clearly not very common either.