(I am not an economist, never took a class in economics, but am interested in the field and like to read about it, so talke all of this w/ a grain of salt)
It is not so much about questioning economics 101 principles as much as questioning their validity in the various economies. Taking the example of comparative advantage and more general trade theory, there are well known, respected economists (e.g. D. Rodrik) who have argued against the scope of their validity.
There also seems to be a debate about how 101 is taught in schools, see e.g. [1].
You're right, it's a larger question of validity in these nuances. I knew I'd get in trouble saying "101", but I hope people will read that in a sympathetic light. (Ha!)
It is not so much about questioning economics 101 principles as much as questioning their validity in the various economies. Taking the example of comparative advantage and more general trade theory, there are well known, respected economists (e.g. D. Rodrik) who have argued against the scope of their validity.
There also seems to be a debate about how 101 is taught in schools, see e.g. [1].
[1] https://www.washingtonpost.com/posteverything/wp/2016/05/13/...