Doctors deceive people. Therefore, they do something morally wrong. Therefore, they do something morally wrong. They are not extensionally equivalent . They seem to have different origins and are based on different authority .
Morality comes with particularly strong internal sanctions, the law has none.
They are applicable to different people or groups of people . For example, it might be too costly and thus irrational to use legal sanction to punish moral offenders. Laws must benefit the society. Morality also must bring benefits to the society. They are not extensionally equivalent.