Back to my point; You have never knocked anyone out with a neck strike, and I'm willing to bet that you've never actually hit someone on the side of the neck at full force without pads. Would that assumption be correct?
So how do you figure that your ability to do something that you've never actually done exceeds or equals my ability to do something I've done many, many times?
That is like saying that no one can tell if shooting someone in the head with a gun will kill them or not just because they have never actually shot someone in the head before.
You do not have to hit actually hit someone in the neck with a full power strike to know if it will will be effective when you have seen and felt the power on pads and have applied it in sparring, which I have done hundreds and even thousands of times. Why is that such a difficult concept for you to grasp?