Seems like Answers, as cool and interesting and funny as it was, was probably not a major revenue driver or even loss leader anymore for Yahoo. Seems like it'd be an obvious candidate for being cut, as a deadweight project that siphons engineering time from initiatives that actually make money.
Sure, it's sad that it's going away. But Yahoo isn't a charity, it's a corporation, and "jettison projects that cost money and focus instead on projects that make money" seems like one of the most basic tenets of managing a business.
Like, I totally get the argument that when Yahoo or Google or whoever shuts down one of their services it's an annoyance for users. No doubt. But I don't understand how it's a sign of "mismanagement".