If we're using "humanity" to mean human values, this quote seems simply false (presuming that value stability is a solved problem by then). If we're using the word to mean the architecture of baseline humans, it seems somewhere between false and irrelevant depending on what features of that architecture we care about. If we're using it to mean some kind of metaphysical quality of human nature, it seems entirely unverifiable.

We shouldn't edit humanity to remove depression, anxiety, schizophrenia, and other mental illness? No thanks - instead, let's avoiding totally pointless wasting of human capability.