Is the ‘flat earth’ argument valid in any respect and why is this being promoted so heavily?

The flat earth theory has been persistent and maintained adherents down through the ages. This is a relic of disinformation coming from the Extraterrestrial Alliance wanting to create discord and disagreement among people, and in some instances, to discredit the adherents in the minds of others who have clearer thinking about the implausibility of its possible existence. So this idea serves many purposes—to disenfranchise the believer and to sideline them at the same time because they will not be taken seriously about much of anything if they adhere to this notion, which most people dismiss readily as violating common sense, and this is the correct perspective. This is an example of how the power of mind control manipulation can create beliefs on a mass scale that become cultural beliefs that will only die out after many generations have come and gone and will happen only once the programming stops, so this must be renewed with each new generation of humans who are susceptible to being manipulated to accept this notion. It is a fundamental and consistent practice to keep all misdirections going because this serves their cause. The longer a cultural belief persists, the greater it seems to be supported and to even become logical because the fact people have adopted this perspective for many, many years, lends credence and believability because the thinking is that so many people couldn’t be wrong, there must be something to the idea if it persists. But of course, this is flawed logic when the force driving the belief is a deliberate manipulation based on a propaganda message only. There are many adverse consequences to the individuals influenced in this way because this idea will be accompanied by many others as well, all of which constrain the individual, limit their thinking and openness to other perspectives, and will serve to keep them trapped in a small group of people with similar beliefs, and isolate them from the broader world, which is, after all, the intention behind the exercise.