When you say DLNA Profiles I assume you mean the DLNA Server profiles in settings. I don't know if you can or can't delete all of those, and I don't want to try as it could muck up my installation here. But you don't need to delete those as they won't be used if you don't have "DLNA Server" turned on in MC.
If you do turn off "DLNA Server" in MC, that PC should no longer show up on your TV and other devices. See image. Untick DLNA Server. Reboot the devices if necessary as they will remember previous DLNA Servers for some time.
I just turned off the DLNA Server, Renderer, and Controller settings on both my HTPC MC Server and Workstation PC, and then connected the Workstation to the HTPC MC Server as a Client and played some audio and video from the MC Server Library on both the Server and the Client using the Workstation as a Client. It worked, as expected.
I just ran BubbleUPnP and that doesn't see any MC DLNA Servers or Renderers now. PingTools remembers that it used to see MC DLNA Servers, but they aren't active anymore. My Sony TV also remembers that it used to see the MC Servers, but shows them as no longer available.
The MC Client/Server configuration works without DLNA being turned on. It does use some DLNA/UPnP functionality I think for some stuff, but your devices shouldn't see a DLNA Server from any PC that has the MC DLNA Server turned off. If your devices do see a DLNA Server from the PC that has it turned off in MC, perhaps some other DLNA Server is running?
And the option to turn them all off while keeping the server part running.
If you mean the ability to turn off the DLNA functionality, but retain the MC Library Server functionality, and Client/Server mode, I just demonstrated that works.