I would argue increase the bargaining power of Kurds against the state in a time where they had no means in which to push for their interest. Using a historical example, it was the threat of large-scale rebellion by minorities backing up their demand for civil rights in America that made it possible for America to become more socially liberal than it was before while ending segregation. Appeasing minorities was much more profitable for American leadership than oppressing them by the 1960s to 1970s. In any country where the threat of rebellion doesn't exceed the cost of maintaining the status quo and corruption, governments will never change. Also, it's not just Kurds and their situation, but Turkey back in the 1970s up until Erdogan was a lot less democratic and the Deep State was much more of a problem. Leftist were being murdered with near impunity, people were being jailed on bullshit charges, Alevis were massacred, and the Deep State with their Grey Wolves proxies could do whatever it wanted. People had to fight back and the PKk was the result of that as well as oppression against Kurds, ethnic Turks actually formed some of the first generation of Guerillas.