OK. Can you articulate why you object to me using those words, now that we're in apparent agreement that the target customer is actually an upper middle-class woman? I mean, I know why it would cause a few of my professors to sputter, but their rationale for that isn't persuasive. Maybe yours is.
Your summary is my sister in law and her mommy group friends. They would totally buy this stuff if they thought it would make them "better" than the other women in the mommy group or if it were more socially conscious in some way so it could be a talking/bragging point at the next mommy meeting.
It doesn't have to represent the 100% of the consumers of such products. Just the majority.
And by the unwritten rules of how we talk about such things (in essays and such), they don't even have to be "moms of the PTA" literally. It's enough to be "moms of the PTA"-like, ie. ascribing to belong (and exhibit) the same kind of social characteristics (class, sophistication, etc) as "moms of the PTA".