Every conspiracy has a goal. Therefore I love conspiracies. They're interesting. But why would every scientist want me to believe that the Earth is round? What is their interest? I will not live my live differently on a flat or round world. I wouldn't travel less or more. Nor would I change my opinion in different political discussions.
So tell me, why?
I don't think there was a major goal for a globe at first...well not monetary at least.
The goal may have been sun worship. Maybe some kind of occultism having an insignificant Earth moving around the sun god and being reliant on it.
All the tales of witchcraft years ago; it wouldn't surprise me if there were people high up in some kind of occult worship.
From that point on it's simply been added to and better thought out to attain the ruse of the vision that we see, plus the overall space and space exploits that we simply told to accept as being what they are.
To any observer and thinker who simply tries to piece all that together, it can appear legitimate.
For any rational thinking person who tries to actually look deeper into it, it makes no rational sense in most of what is told, unless you are prepared to believe in magic forces and theories that have no basis to them other than an explanation to cater for what we believe we observe.
Not knowing whether the Earth is a pear, egg, sphere, flat disc, hollow, concave or any other wild formation is not going to change anyone's existence because we are what we are and we walk on land and swm in water. We fly in the sky and bathe in the sun, etc.
Any normal everyday care free person will simply just accept it all for what they believe it all is, which is fine.
The fact is though; some of us question stuff because when something does not add up you start to think. Once you start to think, you then start to see things that you never could before.