> Ok I was initially thinking this would be good for oil prices since they are leaving a cartel, but the article is saying this will just create more uncertainty.

Where does the article say that? It says this is expected to lower the price of oil.

It also says that, because the price of oil is currently unstable, the impact will be difficult to see:

> Mazrouei said the move, in which the UAE will also leave the OPEC+ grouping, would not have a huge impact on the market because of the situation in the strait.

But it doesn't say anywhere that there's uncertainty over in which direction this moves the price of oil. The uncertainty is over what the price of oil will be.