Here’s how I understand the situation, RR, and I’ll speak in generalities so there’s no purse-hangups.
She’s asking you about X. You don’t care about X even a little bit and she knows you don’t care. She keeps asking anyway even though you’ve made it clear you don’t care, which annoys you because hey, don’t care. The problem is, she wants you to have an opinion. She wants you to care on her behalf. She’s not asking you in case you have insight about X, she’s asking because she wants you to have insight about her and she wants you to care about the conversation because she cares about X.
I really don’t think she’s being a jerk by asking. It seems like you’re focused on whatever X is, and on the fact that you think X is a stupid topic you don’t feel like wasting time on. I think it’s probably a pretty universal response to be hurt by somebody close to you having that perspective about something you care about. To me, the important point is what you said in the OP:
Does it annoy you, or do you think it’s objectionable, that it does cross your wife’s mind to ask you about purses or family trips? If it doesn’t, it seems like you’re making an analogy from “silly man stuff I don’t need her opinion about” to “silly woman stuff” and missing the point that by virtue of the fact that she DOES care to ask you about purses/trips, the comparison to wallets and motorcycles is poorly drawn. Right? Because you’re comparing something you don’t want her opinion on to something she does want your opinion on. There’s an implied judgment in there about the lack of importance of her concerns, which – it seems to me – is the real crux of the difficulty. You don’t think you should have to care, and it’s important to her that you do care.
As for me, by the way, I generally figure I can learn whatever I need to know in a couple of minutes. It isn’t like black magic or some shit - I’m smart enough to have a conversation about something boring and weird for a little while. Say it’s a purse - well, what do you like about the first one? Ah, I see. And what’s the difference between that one and the other one? Why is that a difference. Oh, all right. Well, maybe because (phenomenon), that won’t be a big problem. Yes, I do see how it folds up really small for travel. How about that.
It isn’t really that difficult, or even burdensome, if you don’t start from the perspective that she’s being a jerk by wanting you to care. So, I don’t know, maybe stop thinking she’s being a jerk?