I think it must be clear that at WikiTree we just don't ''own'' profiles, the projects just are the most easy way and make it possible and more easy to share the earlier/ deeper ancestors with hundreds or thousands of members if needed . Because we only have one profile for each person, this means we need to share, so projects were not started to take away or hijack ''your'' ancestors or the control you have about their profiles, they are thought of and started to make it easier to share our deep ancestors with hundreds or thousands of members and to get them all merged , corrected if needed and sourced and improved a lot faster and easier than if all this work had to be done by maybe just one or two members..
And maybe this explains it better ?
What if Your Ancestor is Protected?
This is a good thing ! It means your ancestor's profile is cared-for by experienced WikiTreers.
If your ancestor's profile is project-protected, it may mean that you can't be the Profile Manager. (Although you might be, if you're the member of the project who's managing it.)
You don't need to manage all your ancestors. In fact, you may not even want to be on the Trusted List for all your ancestors. You definitely want to be on the Trusted List for close family members. You're likely to have information you want to add and when someone else adds or changes something you want to hear about it in your Family Activity Feed. But you might not want to monitor all the changes to the profile of Charlemagne, for example, even if he's an ancestor of yours. Those changes would crowd your Activity Feed so it's harder to watch the profiles you care most about.