Wrong and incomplete. Yes, they are "fortune tellers." But, you don't obviously know the definition of a fortune teller. Prophets are communicators with God, seers of the future and revelators giving new information on past, present and future.
Prophets did observe and go to the Lord with concerns. Then, the Lord spoke to them to what should be said to the people. Unfortunately, too many times the religious scholars of their time would decide how to interpret their words and reject them. Some were stoned as well. Many people simply don't like to be told that they are sinning and become violent to silence them. Same exact thing happened with Joseph Smith. And, today, even members of The Church Of Jesus Christ of Latter-day Saints reject the current prophet's words and accept the scholars and wickedness they have brought upon us.