Currently the only way to change your account information like name or home address is by creating a completely new account - losing all your old information like billing history (or username if you had one before they removed that option; Hello 123j4h4123kk1!34v53456b3436, welcome to spotify) while doing so.
Basic information change within the account should not require such drastic measures!
When creating a family plan, Spotify asks you to send an invitation and then fill out name and address information - many have fallen into the trap where they fill the information with their invitees information. Having your name replaced by your SO's, family member's or ex's name can be quite frustrating or if you want to update your name after a name or surname change... what then?
Another issue is address; people do move from one address to another.
Registering with your mom's address, moving into your own home and inviting your roomate to join your family plan would mean that you'd have your roommate register your mom's address as their own on Spotify, that too seems extreme.
Address and name information shouldn't require a completely new account.