They don't care, and are impervious to rational arguments and evidence.  They have their agenda and you're not going to be able to tear the ball out of their cold dead hand.  It's becoming more and more a waste of time to keep arguing with these fools, and to cast pearls before the swine.  That's not to say there can't be legitimate and rational disagreement, just that these types have made up their minds already and they will not leg go.

The FACT is that I went to public school, graduated with decent grades, got good grades at a strict Seminary for 3 1/2 years, am a software developer by trade ("no dummy"), have been interested in "space" since I was 10, have been out in the world the whole time, and I know more about the Globe paradigm and "outer space" than most Globers. Most people simply haven't looked into it. JUST LIKE ME before I started investigating Flat Earth. In other words, most people believe in the Globe for a few simple reasons:

Everyone around them believes it
Movies and propaganda
Authority (including school, college, etc.)
Taught this from the first day of school, with the globe on the teacher's desk

In short, they believe it out of IGNORANCE. It doesn't go any deeper than that. OF COURSE millions of people will be deceived in such a situation.

• Distrust in Authority and Institutions: Many view globe Earth as a hoax perpetuated by NASA, governments, and scientists to control people (e.g., hiding infinite land or resources beyond an "ice wall" in Antarctica). This ties into general anti-establishment sentiment, amplified by events like the COVID-19 pandemic or election skepticism. As one analysis notes, it's "a rejection of expertise" in favor of personal intuition. Lower-income respondents (<$40K/year) show higher rates (21% skeptical vs. 8% for >$80K), possibly due to economic alienation.
• Religious Literalism: Over half of firm believers self-identify as "very religious," interpreting Bible passages (e.g., references to Earth's "four corners" or a firmament dome) as literal proof of flatness. This conflicts with "scientism," seen as atheistic. Evangelical or fundamentalist views frame round Earth as part of a secular agenda to undermine God (e.g., "God can't be above if He's also below"). However, religiosity alone isn't predictive once accounting for overconfidence in personal knowledge.
• Social Media and Echo Chambers: Platforms like YouTube and X (formerly Twitter) fuel growth via algorithms recommending "proof" videos (e.g., horizon experiments or "Zetetic" methods prioritizing senses over math). Interest tripled from 2015–2018, with spikes around celebrity endorsements (e.g., Kyrie Irving, B.o.B.). Believers form "neo-tribal" communities, reinforcing identity and viewing dissent as persecution. One study of 300+ videos found they exploit culture wars, blending flat Earth with anti-vax or QAnon narratives.
• Psychological Factors: The Dunning-Kruger effect plays a role—overconfident individuals with limited science knowledge dismiss experts while trusting flawed "DIY" tests (e.g., water not curving in a glass). It's tied to broader conspiracy proneness but anomalously lacks magical thinking (e.g., few also believe in UFOs). Youth (18–24) show higher openness, possibly from ironic online exposure or weaker science education recall.
• Community and Identity: Conferences (e.g., Flat Earth International) and forums provide belonging, where believers feel empowered as "truth-seekers." Some enter via other cօռspιʀαcιҽs (e.g., moon landing hoaxes) and stay for the social bonds.

Seriously, this is your response as further "proof" of a flat Earth?!  Wow, talk about doubling down.  Well, at least you and the other half of the CI flat Earth tag team cannot be accused of a lack of persistence or defensiveness.  That definitely does not go unnoticed.