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

Read also:

• Why do people turn a blind eye to bad behaviour if someone is very good looking? Whereas if someone is ugly, they get harshly judged for everything?
• Can anyone or anything overthrow your belief in the Jewish God?
• Why is fitness important?
• I feel so attached and in love with a dead celebrity. My love for anyone else is overshadowed by my love for him. What does this mean?
• What is one thing which you cannot stop however hard you try?
• How should one handle a situation where they suspect their partner of cheating, but their partner denies it and claims it is all in their head?
• Why do some young mothers trick a guy into believing that they're pregnant and it's their child when years later they find out that it's not even theirs should he still pay child support or not?
• Why do atheists not love a G-d that does not stop punishing them harder and harder in this world and the next until they surrender to Him?
• Yankees To Reinstate Giancarlo Stanton - MLB Trade Rumors
• What are your controversial and hot takes on Naruto?
• Why did my ex of 2 years move on so fast after he left me? Why does he act so cold towards me, and as if I don't exist?
• How can the citizens of Russia accept the enormous difference between people? The richest 500 Russians own more than the poorest 99.8% of the entire Russian population combined. Why don't we see any protests?