Author glosses over Watchmen, Stranger in a Strange Land, Neuromancer, The Stand, Snowcrash, The Moon is a Harsh Mistress, The Left Hand of Darkness, and several others that actually had some very interesting things to say on gender roles and treatment of minorities.
Author also ignores entirely the actual depiction of homosexuality and gender roles in The Forever War, and the various ways the protagonist treats (and is treated by!) them.
Author was clearly looking to be offended, and in their zeal ignored both things that countered their position (not surprising) and things that would've substantiated it!
Lucifer's Hammer, for example, can be read to literally depict African Americans and urban youths as savage cannibals. It's a good story otherwise, but there is certainly some facepalming in there.