Anything-centrism is "bad" in that it clouds one's ability to be objective. It also impedes empathy.

It's sort of tied to identity. If you do not cling to a specific identity, then it frees you to empathize with a wide range of people. If you say "I am white/asian/tall/rich", then it forms an in-group vs out-group mentality, and obstructs empathy.

For example, does it strike you odd that any land should be deemed "discovered" when there are already inhabiting humans there?