Just because politicians and gangsters go scot free dure to lack of evidence supporting their crime, doesn't provide excuse to let go off a actor/celeb, in this case Sanjay Dutt, on whom the prosecution (that means the Govt. of India/People of India) has gathered unsurmountable evidence.
Delivering memorised dialogues and wise maxims on Gandhigiri doesn't guarantee that he is a transformed man. He has to serve his sentence because he did commit a crime that has been proved in a court of law.
Justice has been served even though that has taken 14 yrs. We as Indians should be proud, that in our country where the priviledged getaway with crimes using their financial and political influence, the Judiciary has upheld its integrity atleast in this case and has sent an accused to prison.