Knowledge raises the possibility you have of making more money, but that is not the only decisive factor. Many wealthy people have made huge money without knowledge, but through cleverness, influent contacts and sometimes cheating. There are many uneducated people being successful as virtual coaches, retail sellers, businessmen, entrepreneurs and also some without much formal education, but that still occupy important and rewarding spots on private and public sectors. So the logic of life works in many different directions and we can't really understand it on its totality.
I have also seen a lot that people achieve success not only because they are someone who has high insight. Even the luck factor also plays an important role. or also like someone who has special skills also sometimes achieves success faster. For example, in the celebrity world, sometimes beauty and good looks are important factors for becoming famous and being successful. But still, in all fields, of course, we always need insight to make it easier for us in that field and get success faster. but there are also many other factors not mentioned.
You are right that luck also plays its role in someone becoming wealthy because we can see a lot of times some people don't work hard but they manage to get a lot of money out of nowhere or for something that they try just casually, while on the other hand, someone who works really hard for running a business, gives all the time and dedication to it but they eventually fail and their business doesn't earn enough revenue to sustain it.
The same thing happens with educated and uneducated people, there are a lot of uneducated people with very successful businesses and there are a lot of highly educated individuals who can't even manage to get a job with a reasonable wage. That is how life is, it's sometimes unfair and we can't do anything about that.