Janet, the answer to the question in your first sentence is a resounding NO. Any WikiTree member can add a profile for any real person who was born after 0001 AD. It is preferable, of course, to not make a whole bunch of profiles for currently living people, though.
I think your idea is lovely - what a wonderful thing for you to do. It's even better that you're working on their ancestors, as well, trying to connect them.
A profile that does not have a manager is what we call and "orphan" and, provided it is not a private profile, any WikiTree member who is interested in it is encouraged to "adopt" it. You will see a link to do that next to the statement of it's not having a manager.