What absurd opening logic. The first person is a rocket engineer. He doesn't just play Kerbel Space, he designs rockets.
The schematics for Starship allows for at best 15-20 people. Supplies are a thing. The ability for humans to travel & survive for this distance is not established at all, nor is the ability to build structures, grow food, supply air & water, etc
Psychological effects: with a few hundred people, same as in any small society.
This confident nonsense is like discussing reality with an Iraq War Cheerleader Circa 2004-2007 .
There's no plan. To get to the Moon, Starship itself requires ~-15 refueling launches using a method that doesn't exist, despite the taxpayers giving the company 300+ million dollars to develop it.