On Dec. 30, 1930, the first-ever photo of the Earth's curvature was taken by Lieutenant Colonel Albert William Stevens, who was an officer in the U.S. Army Air Corps and an aerial photographer.
This photo is one Williams took over South Dakota in 1936 during a record-breaking balloon flight, which also shows Earth's curvature.
(Image credit: National Geographic/Albert William Stevens 1930)
People aren't lazy, we just all live in a social media landscape where, when someone posts a link with an intentionally provocative title, it's rarely worth the effort to engage with it enough to find out if they're being sarcastic or sincere.
Sometimes this means that well-meaning people get downvoted. Oh well. Learn to read the room.