here is a Truth. you could be skinny as fuck. but if you had mentally internalized the idea that you where fat, you could end up dying like Karen Carpenter
be careful how much you have invested in any idea. if I truly saw a round earth, I'd change in an instant. i am not attached to it. I love the truth more than my comfort (because it would be false comfort.)
It turns out, you claim it's straight but have you actually shown that to be true? Cause it isn't. Check a map of the Suez canal
100 miles as the crow flies. it is actually longer than that. the actual length is unimportant to calculating the curve, so I had to find the true distance, the straight line distance, to make any sort of accurate prediction of the curvature.
So now we know the numbers you started with are a lie,
nope, they are not
your picture shows clearly the 'mirror line' .. what is it? a mirage, it is what makes it appear the boat is 'sinking below the horizon' among other things.
in the picture below, the red line is the mirror line. the green is the actual horizon. (roughly)
here is a great video looking into this mirror line... the ship isn't going below anything, it is getting covered up with a mirage. mirror line stuff starts at 3:04
maybe you could stop jumping to conclusions and realize that in science, if I can prove even one part of the theory wrong, there is a problem. the lack of proof of curvature of the earth is pretty freaking huge on the scale of problems with a theory.
If you don't get that, than stop calling what you are talking about science.