Why do flat Earthers still exist even though it is scientifically proven that the Earth is spherical?

Read also:

• UK civil servants who used AI saved two weeks a year, government study finds - Financial Times
• Why don’t Jews regard Jesus as an important teacher or rabbi, if not the Messiah? Putting aside messianic claims, wouldn’t Jesus be one of the most significant Jewish teachers in human history?
• What do you think of a parent telling their adult child to “keep their personal life to themselves” in relation to talking to them? No reason they should say that it was mean what should I do?
• Do all you people that took the "jab" feel lied to yet?
• Elon Musk threatened to decommission Dragon spacecraft. Here's what that would mean for NASA - ABC News
• Drinking coffee could help you age better, according to this Harvard study. - Stewartville Star
• I read this: "Putin is a brilliant, courageous, ingenious, determined, beloved, and incredible modern leader. He is currently the world’s most effective and strong leader, the best the world has seen in centuries." What do you think about this?
• No. 2 Coco Gauff faces No. 1 Aryna Sabalenka in French Open women’s final - NBC Sports
• Do people have to be a pastor to baptize?
• Switch 2 Tears Of The Kingdom Confirms Link Respects Women - Kotaku
• Smoking Weed and Eating Edibles Share This Surprising Health Risk - Gizmodo
• Do all armies have the same rank structure?
• Have you ever been forced to dress like a girl?