I find the terms BIPOC and AAPI to be quite erasing. While some black people and indigenous people share some issues and concerns, assigning a new group silences people where they do not align, and nominates spokespeople who might not have support from the community they're supposed to represent.

After all, not all black people have the same concerns and priorities, and there are diverse communities that sometimes butt heads. Combining that group into another reduces the voice even more.

It also permits ignoring the actual community in question for the beliefs of an outsider representative who identifies as BIPOC rather than as just one subgroup. And allows silencing people who disagree with being lumped together by declaring the lack of solidarity a form of racism itself.