If you can't hit it with the weapon what is the point of even mentioning the weapon? You might as well have said you could fight a drone with a baseball bat for all you contributed to this discussion.
I was replying to someone who claimed a .50 cal could do the job. I was pointing out that firepower wasn't the limiting factor - you could do it with something smaller, but that wouldn't matter.
The second paragraph was the main contribution; the first paragraph was a transition from the statement of the person I was replying to.