Huge appreciation and good wishes to those involved in this. To what extent do you intend for it to complement or replace efforts that have come before? It would be great if this could eventually serve as a https://grapheneos.org/usage for non-technical folks.
I think the introductory section needs to be even more high level to avoid overloading people with technical details. You can also probably afford to put the sentiments expressed in the Final Thoughts section up front near the beginning. For example, first thing would be starting with the stated purpose for user profiles:
Although user profiles have some security and privacy benefits, their primary purpose is to allow multiple people to use a single device. This means that each person can customize their own profile as they please.
I really like the AOSP summary as well here:
Android supports multiple users on a single Android device by separating user accounts and app data. For instance, parents might allow their children to use the family tablet, a family can share an automobile, or a critical response team might share a mobile device for on-call duty.
Maybe first talk a bit about those use cases or at least indicate some resource that talks about those. From there you can talk about creative ways to take advantage of the multiple users feature, as well as the setups described later on. Make the technical details and depth the last thing the article addresses if possible.
Another suggestion, if you'd have it, is a stylistic change. I really like the question/context vs. author conversational style of writing used for example in https://tailscale.com/blog/hamachi. With more personas it can also serve as a good way to highlight how different people have different priorities and distil the features to their key universal benefits or limitations.