[bastih]

One guess would be that people have become afraid to step in.

[gubbrora]

I think people are rationally not stepping in, as those who do step in don't get recognition. They do however risk getting a lot of flak for having been insensitive or whatever.

[stcredzero]

They do however risk getting a lot of flak for having been insensitive or whatever.

In other words, there's no culturally accepted way of calling people out.