But not all types of plants, as invasive species will wipe out diversity.

Have to find a place where there is variety that is within a certain range of the rest so they bring each other up.

True.

Best example of this is in the urbanism space IMO, where we frequently speak highly of various cities and regions due to their amazing designs and infrastructure, but there's not much mention that there's more to a city than that - such as the job market, housing affordability, services, crime, etc...