Come on, why would Pluto want to keep hanging out with the planets, the dwarf planet club is much bigger and cooler. And either way, pluto has a moon named Charon that's so big it's debated whether it should be called a moon or another dwarf planet...
I have so many questions about flat earth theory. Many practical questions like you noted but also more general stuff like who benefits from it? Conspiracies usually have some secret order hiding the truth in order to maintain power or enrich themselves. What difference does it make to anyone what shape the earth is? It doesn't seem like it benefits anyone to deceive the world about that. Maybe globe makers since a 3D object is more expensive than a map on a piece of paper?
These questions pop into my head every time the topic gets brought up but I don't make the effort to look into it because at the end of the day it feels like a pointless exercise to peer into the mind of a lunatic looking for rationality.
Governments and other entities start wild conspiracy theories with people who are susceptible to them so that people who discover real conspiracies look crazy.