As I can give you full permission to a user in a database. For everything you have that database and the objects to be created in the future.
This means you can access all the schemes, all tables, views, functions, etc.
If in the future you create a new view does not have to do a specific GRANT to that user since the user is the "owner" of the database.
Try saying the user is super-user and restrict access only to the database from pg_hba. But being super-user can for example delete another database that is not theirs.
Thank you very much,
Gabriel.
