Upper wisdom teeth present with less anatomical risks . Removing them for the sake of removing them is not a good idea. If they have a cavity, an infection, if they're significantly impacting your hygiene and challenging to clean, if they're impacting normal activity such as working, studying, social situations- or are such that you are "always thinking about that damn wisdom tooth"- entertaining their removal is merited. When they aren't impacted upper wisdom teeth aren't terribly difficult to remove. Usually the jaw bone isn't as dense and they aren't anchored in the jaw as tightly as lower wisdom teeth.
I am not in agreement they should be removed just for the sake of removing, or just because the may appear to cause crowding. There should be sound reason and patients should be correctly informed. In my opinion wisdom teeth are largely removed without serious need.