Why are tech weapons non-lethal vs cyberpsycho events? (And are other weapons also non-lethal?)

[MicBenSte]

I landed perfect headshots (thanks Apogee Sandy) and accidentally took 1 shot too many (hadn't kept track of the damage numbers well enough and nearly fumbled). To my amazement, the cyberpsycho - instead of losing their head or otherwise being killed - just went knock out. I tried it later on with another and another, and it turned out to be they wouldn't die. Excellent for my purpose, but WTF-worthy since perfect headshots on regular enemies with my tech sniper just would blow their head off.

Are other normally lethal weapons also non-lethal vs cyberpsychos?

 

[Krul2k]

Most my weapons seem non lethal if i play right, IE I'm not going berserk.

Their is exceptions like Blades etc but all my guns seem to disable rather than kill with enemies going into the "downed" state, i can typically go up to the target in this state and intentionally shot them to kill though