Not always. There are plenty of people with autism who are super successful because of it, obviously depending on the type and degree of it. My dad has aspbergers and it made him an incredibly good trauma surgeon because he doesn’t get very emotional and just goes to work trying to save the patient. You’re the one who said mental illness is prevalent in the animal kingdom, I’m just waiting for your proof of this. Homosexuality, bisexuality, etc isn’t harmful to humans who fall under the category until bigots like you impose your stupid ass ideas or thoughts onto them.
You've taken someone else's view points personally even though they weren't harming you at all. I've said nothing that amounts to bigotry or even stupidity. You appear to be much less tolerant of other people's tastes and rights than you ask them to be. That is what actual bigotry is.
As for Asperger's and autism, these are widely recognized to be mental disorders (and to be due to neurodevelopmental abnormalities as I mentioned in my casual definition). No one said anything about people with mental health problems not being able to function in society.
As for "proof", it can't be given on the basis of studies because there haven't been many, but for obvious reasons: wild animals with severe brain disorders don't last long in the wild. They'll be killed or just perish because they'd have a functional disadvantage. Here's an article discussing that a bit: Can wild animals have mental illnesses?
Also, many researchers still are biased against animals having minds or being able to suffer at all, even though those beliefs are not supported by the evidence. That explains why so few studies are done on it. There is a biased paradigm against it.
Here's an article that did try to look for empirical evidence in a species and found it: Fear of predators causes PTSD-like changes in brains of wild animals
But there have been many studies showing that animals in captivity can suffer and show strange behaviors from unnatural conditions much like humans do.
But if you think animals can't have mental illnesses I assume you believe either one of the following must be true? 1. animals' brains can't come out abnormal due to genetic mutations or neurodevelopmental disturbances 2. mental health/illness in humans is not due to brain (dys)function in any way at all 3. animals don't have minds in any way at all
I think there is evidence to show that none of these three assumptions is plausible so I'm curious as to how you explain only humans being able to be mentally ill? Indeed, how would you characterize mental illness in humans in the first place?