How does that work when flat earthers actually weave elaborate "theories" about the physics and mechanics leading everyone else to conclude that it is round? It

How does that work when flat earthers actually weave elaborate "theories" about the physics and mechanics leading everyone else to conclude that it is round? It's not like they say it's flat and stick their fingers in their ears. They respond with plausible-sounding retorts that, while obviously untrue, often make sense in isolation. For everyone else, the explanation of "the earth is round and gravity goes brr" is far less cognitively intensive than all the mental gymnastics flat earthers engage in.