

https://cincinnatizoo.org/celebrating-vernon-the-oldest-mammal-at-the-cincinnati-zoo/
The Cincinnati Zoo has been maintaining that bonobos are our closest living relative for over 17 years
I’m not strongly disputing the information you provided, I’m just pointing out what I have seen. There does seem to be some professional dispute about this:
https://www.bonobos.org/blog/bonobos-our-living-ancestor/
The idea that chimps and bonobos are equally similar in DNA is probably correct. I see it repeated on NPR, Duke Universe, and the NIH. My guess is that the push for differentiation is some combination of conversation efforts and both morphological and social studies.
Hah, yeah, this is very far from my specialty, fixing computers. I only felt empowered by my many trips to the zoo and Google-fu.