“List-like prose" can occur in a variety of ways, and they all have the same result—flat writing.
Writing is more than simply writing down what happens in a scene. Good writing has a musical flow, drawing the reader into and through the paragraph and seamlessly handing them off to the next paragraph. Without that flow, you get a monotonous rhythm that puts readers to sleep:
I ran down to the lake to look for my little sister, Georgia. I found her sitting on the dock, her feet dangling in the water. I yelled for her to come home, but she didn't seem to hear me. I went over and nudged her in the arm. She screamed and fell off the dock into the water. I just laughed.-Yawn-

