Have you ever directly experienced anything in your entire life that would lead you to believe you were living on a sphere hurtling through space? If you hadn't been repeatedly told it was true, would you ever suspect that it was?
There is your answer: Your own eyes.
I cannot see curvature, but that does not mean it does not exist. I cannot see viruses but people get sick. I cannot see air, but I can feel the wind. I cannot see electromagnetic waves and yet my wifi and cell phone work, dropped calls and everything. I cannot see atoms and yet we have figured out how to split them (for weapons and energy). I cant see radiation but no way in hell you would get me to live within 500 miles of Chernobyl. Although apparently since its been covered, the radiation exposure is limited and the area has become something of a tourist destination now. No thank you. I'll stick with Disneyland.
Look at an airplane. Who would think that a 400 ton object could fly (certain variants of the 747 weigh around 800,000 lbs) If you had not seen it for yourself, would you believe this is possible. And yet through the magic of engineering and physics we have figured out how to make a plane defy gravity (assuming you believe in gravity).
The rationale that "I don't see it therefore it doesn't exist" mantra of the FEers has to be the absolute worst reason to believe in anything. The same goes for "I don't understand it, so it cant be true."
Have you ever directly experienced anything in your entire life that would lead you to believe you were living on a sphere...
There are lots of things that at least hint that I am on a spherical planet if not outright prove it. The most obvious is all the pictures taken from space that show the spherical earth. However seeing as how those are all fake, we cant really use those as 'evidence'. And besides, since I have not personally taken any of those pictures, that doesn't count as 'directly experienced'.
However, I have personally seen a lunar eclipse. Something has to be casting a round shadow on the moon. And the only way a rounded shadow gets projected on the moon at every angle is if the earth is a sphere.
Looking up in the sky, the stars rotate one direction in the Southern Hemisphere and the other direction in the Northern Hemisphere. Again no possible way to explain this on a flat earth. Technically I have not been to the southern Hemisphere so not sure i can count this as 'directly experienced' but i will lump it in here anyway.
The sun and moon are obviously spheres, I have seen Jupiter through a large enough telescope to know its a sphere, same with some of the other planets.
Why would all these be spheres and the earth flat.
As a rebuttal to your statement, these are just a few things that had no one ever told me the earth was flat or round, I would have come to my own conclusion that the earth was round. Or at the very least, make me suspect it. I would certainly not automatically assume its flat 'because I can't see curvature'.
... hurtling through space?
This is a more debatable argument. It is much more difficult to find direct experience/knowledge/proof that the earth is moving through space. I won't argue this point.
Evidence for the shape of the earth is everywhere, Flat earthers just refuse to acknowledge it. Their argument is, we don't see curvature, therefore it doesn't exist. End of story.