Why is Earth the Only Flat Planet?

Another common question posed by Globe Earthers is, “if the Earth is flat, then why are all the other planets round?“ To begin with, the Earth is a plane, not a planet, and by simply adding a “t“ on the end modern astronomers have linguistically transformed our Earth plane into a globe spun around the Sun. The word “round“ is also deceiving, because most Flat Earthers would agree that the Earth is round like a coin, just not round like a ball. When making this argument online, Globe Earthers will often present a picture of the traditional heliocentric model with eight spherical planets and a Flat Earth among them floating in space. This entire concept is a strawman, however, as no Flat Earthers believe in a flat planet floating in space third from the Sun in a heliocentric solar system. In NASA’s many CGI depictions the planets do indeed appear spherical, but when looking at them for yourself through a telescope or super-zoom camera, it is certainly contestable w