This is not the place for this comment, but this is my place.
I believe that forgetting is an important part of moving on, of being able to compromise in very construtive ways. So I’m pretty sure that this prof’s heart is in the right place.
But I think the issue is much less nuanced. If we have a good and verifiable record of everything all of us do, our public behavior will have to conform to that model. Our lack of information in the past offered countless opportunities for operators to game the system, but if we know who we all are and who everyone else is, all sorts of trusted (and fair) endeavors become possible.
I think much of what the past was built on was a duplicity, and that is going to be impossible going forward. How quickly that’s going to reshape the world is exciting possibiltity today.