Are you as skeptical of these NASA debunkers as you are of NASA itself?
Oh yes, in this area, there is a bunch of shills, a bunch of paid opposition, a WHOLE bunch of people who do not know any science and/or logic. And you often cannot tell who is what.
You know, like you said, way up above, many times people say they can see over the horizon, but it turns out the math was wrong.
So, as i said, I do not believe in the ball earth, because too many disproofs... but what to believe in? There are no good theories.
I will try to find the website that copied the guys paper that did the light houses thing. This was pre-internetz.