short on suprematism

I am having a hard time buying it. As I understand, Suprematism is a movement based on nonobjective creativity that denies academic representation of the natural world and aestheticism in any form. I accept this. However, I cannot seem to get past two points: first that the Suprematists glorified themselves as creators of new form and new meaning. As I see it, they used geometric form and color, both of which were derivative from nature by their predecesors, to accomplish this. I understand that their ideas were in reaction, or revolution rather, to their environment, but I do not see the truth in it. How can something completely new, without any relationship to the already created world, be made by humans of this world? The amount of ego required for this way of thinking astounds me. Secondly, it seems that so many of these artists aimed to turn away from creating art solely for the art community, yet I do not think that the common person could obtain any higher meaning or somehow elevate themselves by interacting with Suprematist work. The theory behind all of it is so far removed from our natural, daily experience that I do not see the work as successful by it’s own goals.