Why would you agree to do such a job?
"Because it's my job!" <- if someone paid you an obscene sum of money to bonk random people over the head with a baseball bat, would you take it? No? Then what's the justification for torturing mice?
"Because it's my job!" <- if someone paid you an obscene sum of money to bonk random people over the head with a baseball bat, would you take it? No? Then what's the justification for torturing mice?