Should Professional Church Talkers Personally Demonstrate Their Given Advice?

Jesus and The Apostles materially demonstrated all they taught.  Should Preachers today be  exempt from doing so as well?

Or, are today's Professional Church Talkers accountable to a standard different than what they graciously promote into their laity?  Recall how words and intentions are not material deeds.  Formulate a useful  response without first trying to establish some wordy and needless  context.

Blessings.