Group Title, only optionally make it default

When I create a new group, I want it to offer a new selectable title to the group members. However the option to do so in the Manage->Membership->Effects->Default Title does not only provide the title as a list entry, but it also selects it. Should this be a two part setting with “Title for Group Members” and “Enable by default” or at least bind it to “Enable as Primary” instead?

Must be missing something here, I dont want to mess with the hand-crafted appearance of my users by forcing them a secondary title.