they're very ugly indeed but that's nonsense, they are humans, no doubt about it lol
I'm also not sure if IQ is the best way to measure intelligent, in think in the future we probably will regard this as obsolete. I don't think the whole human genome has been reestructured in the last 100 or 50 years, yet when you look at phenomena like the flynn effect, most human populations grew their average IQ by 30+ points in the last decades, almost correlated with economic development
Abos whoever do have a small percentage of their DNA from other hominids, like denisovans, kind in a similar way as asians and europeans (and pretty much every human outside africa) have a degree of neanderthal dna in ther genome.
But yeah, overall i think you're just being lookist. I don't think they lack anything other humans have to do any tasks, they wouldn't made that far if they did. I don't think you really did any research on this as well, I'm pretty sure we have examples of abos in many fields of science
I can even recall reading about this guy off the top of my head, even though I'm not particulary informed on australian culture:
en.wikipedia.org