What's the alternative? The article reads like the majority of employees are men, making 70 degrees optimal for maximum employee happiness, but "just leave things as they are" doesn't seem to be the solution the article is driving at, either.
That's kind of how compromise works - everybody gives a little. Nobody gets exactly what they want, nobody is completely left out.
Or people who like it warmer wear more clothes. I'm a guy and I always bring a sweater or two in the summer because of AC. It's a lot easier for me to warm up by putting on more clothes than for someone warm to cool off by wearing less—which is not a reasonable request at work.
70F in Summer? Then, which temperature would you set up in winter?