The sphere-earth model just makes much more sense, than the flat-earth model. Simple as that. Only because you cant comprehend it in your mind, doesnt mean its false, or a conspiracy.
You base your claims on science, which is already your first mistake. Science is false. Go outside and witness the proof. I have never seen curvature with my own eyes.
Nor did I. But the curvature explains many phenomens, which cannot be explained otherwise. Like sunset/rise, solar/lunar eclipses, the groundpaths of airplanes, etc.
Have you ever seen that the earth is flat with your own eyes, either? You probably don't believe any human has been high enough to see the curvature with their own eyes. Even at 40,000 ft airliner altitude the earth is still supposed to look flat according to the spherical model.