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

Read also:

• While on the surface of the moon, why isn’t the Apollo 11 spacesuit inflated like a balloon from the 3.7 psi internal pressure?
• What was Easter day like for you as a child?
• Do opposites attract? How often do you see weird couples like a guy/girl dating someone who is boring with no sense of humor ?
• Biotech pauses trial after second patient death linked to gene therapy - The Washington Post
• What qualities do single women typically look for in a man? Is it a common preference for women to want a man who earns more than they do?
• Why do Democrats look like snowflakes and Republicans look like Vikings?
• On Which Part of the Body Might One Wear Winklepickers? - Slate Magazine
• Which Bibles can one read and be confident they are reading the inerrant word of God?
• Why should the US public listen to Lauren Boebert, the queen of hypocrisy tell us, "We need morals back in our nation" when her real-time video is the heartbeat of immoral? Why does her audio not match her video?
• What do you think is the #1 cause of why relationships nowadays don't seem to last long?
• What was the weakest period in US history in terms of military strength? Was it during World War II or the Vietnam War?
• How did Madri, mother of Nakula and Sahadeva die?
• Is it wrong that I picked to be a Christian (as a teenager/14-year-old) even with knowing all of the information about other religions/atheism?