that joke was already made (and removed)
If your boss is asking you to do something you are not comfortable with, or is against safe practice, you need to raise it with them.
I do, however, get the sense from your previous posts that you will always find something to be uncomfortable with WHATEVER your job is, or something that'll make you feel like a "bad person", and it might be better to concentrate on changing the way you view yourself (whilst JFD'ing the job) so that you dont feel so anxious about things all the time. I can guarantee you that no-one else doing that job feel anxious about it like you do