As this was a very debated topic when these stick forces were implemented for the 109, I searched and found a reply from Yo-Yo regarding the ED's philosophy behind them.
https://forums.eagle.ru/showpost.php?p=2309657&postcount=48, reads:
"in DCS we decided to have controls movement, so control surfaces as they are in reality. That's the point. This way the simulated FM fits the real one regarding required stick movement. Of course we understood that shorter travel of the majority of game controllers will require less travels to get the same result comparing the real aircraft. Nevertheless, this model gives good feeling even if you get the real plane stick after hundreds hours in virtual plane. I had an opportunity to compare the real P-51 to its DCS twin... the feeling was that the real plane behaves exactly the same you use to feel it in DCS regardless of higher forces at the controls.
Excessive control forces in any simulation can be done using so called cutting force (any movement of the virtual stick are not available beyond this point) preceding with the zone of low responce agility. So, for example, you can pull the stick up to 70 kg but accurate piloting is not available since the force is higher than, say, 20-30 kg. "