I misread you the first time. Duty to me is not really something that is prevalent in our western culture, however, the culture of positive do's you call positive moral duties still revolves around what society deems valuable, which is money. So anything that gets money is seen as good, and the reverse bad, the rest, indifferent. And indeed, we learn this gradually, however there must be some overlap between our moral instincts such as doing good work, and preserving the status quo, avoiding conflicts.

I did not realize that positive moral obligations could also be self limiting, yet we are striving towards it, because they are what we should be or do, culturally.

One would require basically therapy on a global scale to change something.

But yes, I agree with your premises. I do think it is gradually shifting already, the last generation understands the flaws of our current system and strives to behave otherwise. One very obvious thing is the openness of discussion of mental illness and the struggles of life.