All caps-uniform in size and letters-are typographical boxcars that are hard to read. It is a wonder that lawyers use them at all. But use them they do. All the time.
Take a look at the example below. This is a screenshot from a recent appeal.
Hard to read, isn't it? Compare it to this example.
The second example is so unadorned that lawyers think they need to spruce it up with caps or italics or underlining or whatnot. But they shouldn't. The simple typographical structure allows the reader to focus on the content of the brief. Which should be the aim of any writing, legal or otherwise.