What is the purpose of registration form entry data after activation?

During the registration process using gravity forms and the registration add-on, users and their associated field entries are stored in forms entries. When the user is activated, the form field data is transferred to a newly added WP profile (although custom fields are not displayed in the profile page).

What is unclear to me what I am supposed to do with the form entries at this point. The user data has been transferred to the user profiles so why keep the form entries? If I delete the form entries of a user, that user is still within the normal WP user database. It seems confusion to hold two user lists. Additionally, any changes to a user profile with WP won't change the original form entry of the user. So the two user lists are now out of sync.

Am I missing something? Is the forms entry only useful until activation of the user?

That is very cool. So if I am understanding this correctly, when a user registers with gravity form/user-registration add-on both the form entry and WP profiles are populated simultaneously (whether or not the user has been activated)? Doesn't the user need approval (activation) before the data is transferred to the WP profile though? And if so, would deletion occur before activation? Forgive the newbie questions. I'm still trying to wrap my head around the process.