no, it can be for other reasons, for example, self defence, a disagreement, to gain territory, for profit, expression of rage, etc etc. NB :these reasons might not be right or wrong, but they are motivations outside of seeing someone die.
The idea is that in "I shot a man in Reno, just to watch him die” there is no other motivation. The only motive is to see the guy die, in a singularly morbid motivation.
How much more detached and psychotic can you get? Even with goregrind, the motive is clear, albeit deranged. This is just, fuck it, I just want this person dead just to see them die.
there was a whole pile of shit happening between gearbox and the original claptrap.
As for the current(? no idea, havn’t played anything after pre-sequal) claptrap, they want star power, which is why the mario movie cast had none of the current voice actors for any of the characters.