We as a society are claiming Australia to Chile distance more than 20.000 kms since 1956.
Sure, Samuel Shenton founded the Flat Earth Society in 1956
I have very serious doubts, however, that "society are claiming Australia to Chile distance more than 20.000 kms since 1956".
That is, other than implicitly in the "Ice Wall", which is exactly what these flights disprove.
So you cannot use your map as evidence to prove that these flights are incorrect - that's a circular argument.
Not only that but many flat-earthers claim the the map you are fighting over is wrong!