Thanks Gordon; this nicely puts into words something I think about this. If a person changes their views as the result of research, introspection, or new information, this could appear, from the perspective of people still holding their former views, to be value drift. Even someone's process of becoming altruistic could appear this way to people who hold their former values.
Is there any forum online where individuals can put their personal circumstances/choices/options up for discussion? Kind of like the 80 000 Hours coaching service, but since they don't have the resources to advise everyone, more of a crowd-sourced effort where someone could say "I'm in this situation, considering X, Y or Z, can anyone provide opinions/experiences/perspectives/alternatives I may not have thought of?"
I was kind of hoping this forum would be like that, but it seems like it's more academic - and the posts are very interesting and high-quality, so I wouldn't want to see it spammed up with thousands of personal questions. But is there anywhere else on the internet where people can ask this stuff? I have literally been asking careers counsellors since high school how I can make an impact on the world, and they haven´t necessarily had the best info.