Beyond the Mother Role

I am occasionally called by a market research company to be screened for focus groups or surveys regarding household products. Usually these events pay some cash ($50 or more) for your thoughts, so it is usually worth it. So far, I've participated in a diaper focus group, a radio station listening survey and what amounted to be a poster presentation for a take-out pizza company, but I've been screened for many more which I didn't qualify for.
Sometimes it's pretty clear which question boots you out of the eligible group, like: "How often to you, personally, wash and wax your car? A) 3 times a week B) 7 times a week C) Never. Clearly, the right answer is not "C", which would be my answer. It's especially clear if this question follows normal boring questions, like demographics (age, job, number of children, etc) or "Do you ever eat?"
More often it is less clear why I am not eligible. They could have enough stay at home moms in their early thirties or responders from my zip code. Sometimes I suspect it is because I do not answer this question correctly:
Please select the option that you most identify with:
A) I am a mom first and foremost. Nothing is too good for my kids. I will spend every last dollar in my pocket buying stupid crap my kids don't need, but that I need to buy for them either because I can't say no or because I feel so guilty that I have to compensate with material items. Brands matter to me, because inferior products make me question my self worth. My kids are brats and I am a snob.
B) My kids are the center of my universe. Every breathing moment is spent catering to their needs. Though I am conscious of my budget, I will spend money if it reinforces my life's focus--my kids. My kids are brats and I am a doormat.
C) I make a budget and stick to it. I work my fingers to the bones to provide my kids with the basic necessities of life. I am exhausted, but my kids are well-cared for.
I'm exaggerating of course, but these are not too far off from the intent of the classifications from these surveys. I have to wonder about the marketing people behind these questions. But I also have to wonder about the women self-selecting these groups. Notice that there is no None of the Above option, so to continue, you have to place yourself in one of these awful categories. I know lots of moms--amazing women with excellent strengths and a multitude of interests beyond their progeny and none that I would say their only virtue was motherhood.
As a mother, I love my children and revel in their growth, but I am much more than a mother and not solely defined by my motherhood or the singular relationship of my contribution to the next generation. I pity anyone who does define themselves only as a mother--what about wife, daughter, profession, neighbor, or friend.
We were people before our children and we'll have to have something to return to once our children leave the nest. I believe that I have much more to offer the world than my ability to foster growth in my womb and rear my children. Hence my rejection from the marketing surveys.