Sounds like he followed the lead of the Aruch HaShulchan.
No, he sure didn’t. The Aruch Hashulchan (OC 75:8) specifically says that it is forbidden for a woman to go outside without her hair covered. He is only maikel regarding it being considered erva when a man must say a bracha, as long as the man cannot see her hair while he is reciting the blessing. But he decries in very strong words the women who didn’t cover their hair and does not justify it in the slightest.
Aruch Hashulchan 72:7: “Now let us come and cry out regarding the immodesty of our generation, because of our many sins. For many years (some) Jewish women have been neglectful regarding this transgression, and they go with uncovered hair. All which they (the leaders, rabbis) have screamed about this has not helped or accomplished anything. Now the plague has spread, that married women go about with their hair just like unmarried women! Woe to us that such has occurred in our days.”
Herschel Goldwasser essentially justified the crime, not denounced it like the AH”S. Which is why HaGaon HaRav Shlomo Miller shlit”a likened it to Aharon Chariner, whom the Chasam Sofer compared to Acher.