Psychology had to be a science studying behaviour and mind of living beings.

There is a separate part of it studying specifically human behaviour and mind.

However, there is absolutely no any definition of how exactly human behaviour and mind different from non-human ones and how to separate one from another.

So, psychology can't even give an answer to the very basic question that obviously should precede any further study - is some person mind and behaviour human or non-human?

Psychology could have been very useful instrument to detect those with non-human behaviour and mind among us with scientific precision, but it was purposedly turned into pseudoscience bullshit to not even allow that question.