Why not just set Config.Metadata.Full to false?

[wy92]

Description

since every kafka client operation(produce/consume/...) will refresh metadata when the operation was failed, and retry the operation when client get metadata success. why not just set Config.Metadata.Full to false as default? this will reduce a lots of network traffic/ broker's cpu pressure/client's memory pressure when kafka cluster saved a large number of topics.

Additional context