Why the Light Brigade does not describe cavalry in 1914

Why is the Charge of the Light Brigade a poor model for First World War cavalry?

The reply emphasizes later doctrinal development and the use of horses to move troops who often fought on foot.

The closing exchange dates the Charge of the Light Brigade to the Crimean War and emphasizes the decades of subsequent development. Mounted combat is described as a secondary method for much later cavalry, with horses often supplying mobility to troops who fought dismounted. British service in India supplies the example, and dragoons provide the historical comparison. The participants distinguish those duties from a picture of every mounted unit relying on shock charges. They also raise Russian Cossacks as an exception, without developing a detailed comparison of national doctrine.