Yes, I changed the title to the linked page to ‘A path from Seattle’ from ‘Go east from Seattle’ because, from reading the comments here, I agree the original title was too misleading. Just updated the title of the Substack post also.
Author here — I agree the image is misleading (and added a caveat to be clearer, though I could have made the arrow smaller).
I don't think the question requires the reader to ignore what ‘east’ means, however. There is unambiguously one direction at Seattle (tangent to the Earth's surface) which is facing due east.
I also didn't mean to take a patronising/arrogant tone to the reader and I'm sorry if that was the impression I gave.