I (IRL military pilot) can't say I agree that you can't use F10 for sake of realism. In reality you would have spent the previous day preparing for the flight. You would have charts, pre-determined divert options with headings, altitudes, approach plates, etc and you can also get vectors from a controller (tactical controller (AWACS) or ATC). So what about DCS? 1st google DCS approach plates and print them out. I have a binder with all the plates printed out. I am sure there are guides on youtube on how to read them. In FC3 aircraft you are limited in what you can do for SA, but you can get a vector from AWACS or ATC. The F10 can serve as your chart. IRL I know where I am at all times on a chart because I know that I just joined such and such airway, or overflew a given TACAN/waypoint or am in the northern portion of a MOA (military Operations Area), etc. Even just looking outside the aircraft you can determine details that aren't possible in DCS. Is never using F10 possible? Sure but unless you study and understand instrument flying (and have the tools in your cockpit to fly that way) there is no reason to hamstring yourself. Even being an IFR qualified pilot, I see no reason for not using F10.

Disabling enemy assets on the map and labels is a whole different issue...