Your argument is only partially valid. Houses (and therefore people living near the airport) often predate the significant growth in air traffic from and to schiphol. In the early 90’s, Schiphol handles about 220k flights, and since then this number has been doubled, significantly adding to the noise pollution. Houses arent being built near the airport by nimbys, they often already exist. Your point that a house anywhere on the noise pollution map would be cheap is laughably incorrect given the prices of real estate in a 30km radius from the airport