Married? Don’t Enjoy Sex? Get Therapy.

As I was waiting for my partner to get off the phone with her mother, I picked up a copy of our local newspaper. I was scrolling through, I saw an interesting headline in the advice column entitled "Woman Sees Intimacy as Unnecessary." I read it and was more than a little appalled by what I saw.
The woman seeking advice told the story of her husband, Danny. He was, by her account, a sweet and upstanding man to whom she’d been married to for almost 40 years. He does chores around the house, maintains a yard that is the "envy of the neighborhood," and treats her like a queen. Her problem is that he expects sex once a week:

"Since Day One, I would submit to him because I believed it was my duty, but after 37 years, I consider sex an unnecessary task. When I turn him down, Danny gets depressed and mopes around the house for days."

She concluded that she couldn’t imagine her life without her husband and she just wanted to figure out a way to explain to him that even though she doesn’t want to be intimate, she loved him dearly. The response struck me:

"Please don’t do this. Danny has been a full partner in your marriage. You should be one too, and sex is part of that. When you love someone, you accommodate them in ways that make them happy, whether you get anything out of it or not. Sex once a week is not excessive. Have a doctor check your hormone levels, which we suspect have always been out of balance, and consider therapy."

I’m not sure why, but the response made me sick. I’ve been in a relationship with someone who "expected" sex and it was a fucking nightmare. By the end of it, I wasn’t sure who I hated more, me or her.
No, I cannot claim to be any kind of relationship guru, but I do know this: in my five-year relationship with my partner, she has never "expected" sex. What she does expect is my love, devotion, and fidelity, which I give freely and unconditionally and expect nothing less in return. Yes, we have our little tiffs over sex, but I most certainly don’t "mope around the house for days" and guilt trip my partner until she feels so worthless that she "submits" to me. Don’t get me wrong, I like sex. A lot. But if I am having sex and my partner honestly doesn’t want to, I feel as though I am violating her. Sex can be a very beautiful thing, but if it is a duty, then it ceases to be anything more than that.
Instead of blaming the woman and suggesting therapy, would it not have been more productive to suggest that they just talk about it openly and honestly? Maybe it’s him. Maybe he’s doing something that hurts her. Maybe she has had an awful experience with sex and he doesn’t take her feelings into consideration. Or maybe, just maybe, she doesn’t like sex. Again, I am no expert.
Am I wrong to take offense to this article? Is this what we are supposed to think marriage is about? Is it normal to trade household chores for sex, whether that person wants to or not? I’m just so happy that I don’t have to "pay" my partner to get her to do the dishes.