File permission issues within the team

Permissions within a team have two states, view and edit, but what I don’t understand is why someone other than the file owner can also delete and move the file? I think that within a team, the person who created the file, must be the designer who is designing it, so why can other designers also have the right to delete it? As well as it seems there is no way to retrieve it after deletion, I think only the team administrator has the right to delete it.