That's only if you assume the sun is 93 million miles away, the sun is a projected object whose distance can be measured with sextant. The measured distance to the sun is about 3,000 miles and at that distance the sun's light rays are divergent. The shadows cast by sticks are consistent with a close small sun (measured at a diameter of ~32 miles) over a flat and motionless plane.
Do you understand how much bullshit you're full of?
Why are they telling us this lie?
If indeed flat earth is true why lie to us?