I've never in my life searched for "is X worth seeing", the thought hasn't even crossed my mind. That is maybe not very smart, but before I see it I can't decide it, why would I trust random strangers on the internet? :)
Because there's not many other choices, and the other choices are way more work. And because as a general guide they seem to work pretty well, especially if you read through them with some small amount of care.
