I would say it is demonstrably proven that humanity, while living a normal, day-to-day life, does not witness any curvature of the earth.
You would not expect to see the curvature of the Earth directly during normal day-to-day would you. You can't see enough of the Earths surface from ground level. I would have thought that was obvious.
If you were a microbe sitting on a snooker ball you could not have any direct perception that you were sitting on a curved surface. On the other hand if you were a midge or a knat flying past that snooker ball from a distance of a few cm then it would look curved because you would now be able to see the surface from a far enough distance away to see that it was curved. It is a matter of proportion. The midge analogy is comparable in scale to the ISS orbiting the Earth from 400km up. Astronauts on the ISS can see a large enough proportion of the Earths surface to see that it is curved and indeed spherical. Of course the FE movement dismiss that along with all other direct evidence of a spherical Earth as fabrication or whatever because it goes against their assertion that the Earth is flat.
I am of the opinion our senses are the only thing that is real.
That's absolutely fine. But having an opinion about something doesn't make you right.
I believe it makes me correct in this instance.
Can you honestly write you believe there are astronauts on the ISS?
If yes, why?
Do you believe have the ability to discern the difference between the videos presented as originating from the ISS and those of the movie
Gravity or those of Howard Wolowitz on
The Big Bang Theory ?
I don't believe you, or anyone else, could honestly write that.
Further, even camera shots from the ISS have been shown to present way more curve than would be mathematically expected.