Bonobos are one of Earth's most intelligent species, and seem much kinder than humans. The existence of altruistically motivated human inventors like Stanford R. Ovshinsky and Douglas Engelbart suggests that being bonobo-level kind would not prevent technological development.

This seems like evidence against certain kinds of late Great Filters.

Another point: I imagine if we had evolved from bonobos, we would be doing effective altruism on a much larger and better scale than we are now, for instance. So based on the existence of bonobos, one could argue that if the only filter is ahead of us, more and better effective altruism usually doesn't help subvert it.