Although humans might have been nomads and explorers, what made civilization thrive was settlements and communities. The reason western civilization took off was because we domesticated animals and founded agriculture, something 80% of the people on this plant weren't able to do due to the climate. Being nomadic was rather the exception rather than the rule.

Yup as written..

I believe the nomadic tendency today exists due to a need to escape from the mundane and live as many experiences as possible. it never stops. It is a form of anxiety. Unquenched thirst. A form of existential gluttony.

Can't speak for those doing it, perhaps. If there are two choices - move or stay, then naturally i'll be on the move. Unless there's a reason to stay..