Just another user here …
There used to be a server-only version in the past, but the GUI-version always included the server component, so there’s never been a client only version, thus normal behavior since day one.
With build 1353 in late November ‘23 Roon split client and server into two separate applications but kept one install.
Long story short, if you don’t start the server component it won’t run, so no need to sweat it.
Hope that clears it up for you, and happy listening!