Theme of the frog and the nightingale?

Vikram seth by this poem "THE FROG AND THE NIGHTINGALE" wants to convey that how the incompettitive,rough people like the frog make a fool out of competent yet simple people. He wants to tell that we shold not come under the influence of such people because like the nightingale lost everything her voice,audience and later her life.The frog enticed her by his oily talks and led her to her doom.