As written, it really seems like the correct translation is "tends to". I've never seen this used in law texts and why is a law written this way in the first place??? But then again i don't have much law experience so maybe it's really common?
I can at least tell you I've never ever ever seen "tend" being used to mean "shall".
I found it fine really. He's great at killing because he was traumatized into being a super soldier and having plot amor, not because he's autistic.