I think that if you look at Dieda or Schlessinger through feminist glasses it will seem offensive. We've had this discussion before and I do think feminism has good and bad points. The original feminist movement had justifiable objectives, but I think things have pushed too far and while women think they want the extra "power" and responsibility, both Dieda and Schlessinger argue this is not the case.
Maybe you are not one of those women, I don't know. But I think there is a lot of truth in those 4 summary points I listed. If you read Schlessinger, she says almost the exact same thing but from a different perspective. My list is a very cut-down simplified summary that cuts to the core of what a man needs to understand. From a woman's perspective, her list of what is required in a relationship will be totally and completely different. There will not be one ounce of similarity. But that is because men and women have different needs and objectives.
I bet every man on here could tell you what the needs are of a woman. That message is ingrained into us by our teachers, our mothers, our MILs, our girlfriends and wives. There is absolutely no doubt about how to treat a woman to make her feel good. If a man does what the woman wants, then all should be good with the world. But it isn't, is it?
Have you ever wondered why? If you don't know, read Schlessinger. She speaks to women about the needs of men. Her message is completely different from the feminist message, but her message is one that I think almost all men will find themselves nodding their head with. A feminist may not like it, but why should she? She has been taught all her life how men should treat her and what she should expect. Anything less is heresy. But that doesn't mean men like that. They have just been taught that is how it is.
So to answer your question on why you should take off your feminist glasses - to better understand the needs of your H and help to make him happy.