The first objective of any communication is to be understood. When you're crafting something as fundamental as a Bill of Rights I think the wording should be clear to any functioning adult, regardless of how much legal training they've have.
Let's suppose we uncovered two drafts of the second amendment in some long forgotten box of papers in the National Archives; they read:
Draft #1: A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.
Draft #2: The right of the people to keep and bear Arms, shall not be infringed.
Which version do you think does a more effective job of communicating the framer's intent?