For me, I feel that every artwork needs to represent something that the artist wants to express. An artwork should communicate an idea or feeling.Therefore, I do not want randomness to decide what my work is trying to express. Instead, I want randomness to help me decide what my work looks like.
For example, when I am creating a project, I can first decide what I want to express and what kind of overall atmosphere I want the work to have. Then, I can use randomness to control certain elements, such as shapes, lines, or color. In this way, randomness is not replacing my creative decisions. Instead, it helps me discover forms that I might not have thought of on my own.
As for the optimal balance between randomness and control, I think it is difficult to define. I do not think a 50/50 balance is necessarily the best one. It depends on the final form of the artwork and on how much randomness the artist wants to allow. In other words, I think the important question is not how much randomness we use, but how much of the final result we are willing to give up control over.
I also think randomness can help us discover things we did not know we liked. randomness can produce a result that we did not choose at first. When we see that unexpected result, we might actually like it. In this sense, randomness expands the possibilities we can choose from.