I practiced "divination" through tarots, don't do it. I will shortly explain why it's better not.
-Most of the times you will only be deluding yourself into reading random results, this will make your understanding of the situation more chaotic.
-Fatalism. Blindly believing the prediction can lead to delusion. For example expecting easy luck but then you get kicked in the face by life.
-Future is not fixed, assuming it works divination can only tell the probable future based on your current will. Trying to act to change the future can make the situation worse.
-God's plan. Sometimes things must go in a certain way, even bad things. Not cooperating with God's plan is a serious act of hubris, it hints lack of faith, and in the long run it will not be the best for you.
-What is exactly the force that let's you see the future. Can it be demonic? I don't know but it's better to leave it alone. If God wants you to know the future he has his ways, as shown in the Bible.
-What if stars/tarots/whatever you are using correctly predicts the future but also suggest you to take a certain path? What if the omen says "big disgrace" and you do everything to avoid it, but then realize it was not a disgrace at all and you actually made the situation worse. It has happened to me, the cards said the truth but gave bad advice.