Only in a society of great diversity, where there are people who feel secure in specialising in unique abilities, can new heroes arise in relation to a wide variety of changes in the environment; evolution can only function well when there is such diversity. As such, a diverse and cooperative society will suffer less during periods of adversity and recover faster. A "monoculture" of educational outcomes is thus more vulnerable in challenging times. To unexpected problems will arise unexpected solutions from unexpected heroes whom had talents that were previously less useful.
We are the diverse city and proud of it. Only with diversity can come the most exciting forms of innovative developments; there can't be evolution in a monoculture.