Because no changes to the system should be made in any other way than through operating system packages; that is what they are for. This minimizes dependencies

Because no changes to the system should be made in any other way than through operating system packages; that is what they are for. This minimizes dependencies and simplifies interfaces (two commands, pkgadd(1M) and pkgrm(1M) do everything). The database engineering department decides database names and creates the appropriate packages; that is no longer the decision of the system or database administrators to make. It is no longer their job and hasn’t been for at least a decade and a half.