Yep, that's what they're there for. Several taildraggers (mostly smaller aircraft) do have that cable system attached to the tailwheel. However, this was very limited, as you still usually have well over 1,000 lbs altogether riding on only three wheels. The Cessna 120 and Bellanca Cruisemaster that I've got a little time in, both had these features. Though, you still had to toe brake the crap outta either of them to turn them on the ground. Once it 'unclicks' (about the first 30 degrees in either direction), it usually then functions just like a free castoring tailwheel. A little thrust/propwash over the rudder is great at slightly higher speeds, but it's very hard to pivot a taildragger on the tarmac without brakes. I would say impossible, but I'm sure there are those who can do it without groundlooping it.
Bigger aircraft like WWII fighters and bombers usually just had a free castoring wheel back there.
I do not like several of the taildraggers in FS that have the tailwheel contact point swivel set for less than 180 degrees. It just makes for a 'power steering' experience, and if you've got any time in a t-dragger, you know they're not that easy.
Either way, that doesn't ruin the aircraft; it's just a personal preference of mine. All those taildraggers I mentioned about do indeed have a free castor tailwheel in the sim. :ernae: