They didn't cure many people of cancer back then either, and cardiologists didn't have stent technology. Science marches on. Try to keep track. 
Who's to say they're accurate now and won't change? Another scientific theory I recall back then besides Global Cooling was the Population Explosion. Science and media were pushing that theory as well. We were assured that another billion people and the world would collapse into starvation. Well, the population has increased by billions more and we're still here. Interestingly, many countries are in real trouble because of low fertility rates. There aren't enough younger people in these countries, like China, Italy, and Japan, to support the old populations that will stop working because of age. Science marches on. It's hard to keep track.
