Hahahaha, just you want to find way to please yourself. Urbanization is the stage of development and economic growth, don't take just few atypical countries to support your argument.
All those countries "failed states", urbanization is mainly driven by security reasons not economic, majority of people tend to move to urban areas where security is much better.
But generally if there is no other reasons behind, urbanization is very good indicator of economic development and modern economy and better standard of living. It is in urban areas where you find better houses, Hospitals, schools, safe water, job opportunities and security. Unfortunately Kenyans use money as indicator of everything, you think having much money is development even if the person with too much money lives in Kibera.