The LDP interface is designed so another application can manage the content. The Web admin is useful during development, deployment setup, testing and monitoring, however all real work will be done by service integration.
There are thus two key deployment patterns that are not well supported by the default profiles (simple, standard)
1) an application on the local machine with an integrated marmotta install, accessing it via web services
2) a "database service" in the cloud - where access is from multiple applications.
In each case, it should be possible to access the web admin without denying LDP service access. These are currently mutually exclusive with "simple" and "standard" - making it neither simple or standard behaviour