I disagree that the analogy is even close to being a good one.You don't have to go somewhere to get that info, all the information we get from the fss can be received about objects in our solar system by modern day astronomy equipment.
Think of the FSS as a telescope to get a picture of the objects in the system. THEN we fly there and map it.
Besides which, if I wanted a Radio Telescope emulator then I would have bought one - ED is supposed to be about flying space ships and to a degree surface exploration (at least as of Horizon). The FSS is nothing but a PITA and a boring grind wall with the enjoyment value of chewing chalk.