Were you ever actually a JW?? You don't remember that Peter said Satan was a roaring lion??
Again, you need a physical item of fear to put the invisible fear of an invisible entity into peoples minds.
If I put an actual roaring line to the right and of you and then tell you to the left is Satan. I then go on to say, "Trust me, that Satan on your left is 10x more dangerous, you should run to your right to that lion. You have a much greater chance of survival. Plus, any damage that lion does is temporary. That Satan on your left though, man, that will be permanent."
Which way do you think you'll run? I bet I know which way.
That's exactly what the speaker did and that is the line of reasoning you are trying to defend.