Basically, the problem is that K&T-style insights about cognitive biases -- and, by extension, the whole OB/LW folklore that has arisen around them -- are useless for pretty much any question of practical importance. This is true both with regards to personal success and accomplishment (a.k.a. "instrumental rationality") and pure intellectual curiosity (a.k.a. "epistemic rationality").

From the point of view of a human being, the really important questions are worlds apart from anything touched by these neat academic categorizations of biases. Whom should I trust? What rules are safe to break? What rules am I in fact expected to break? When do social institutions work as advertised, and when is there in fact conniving and off-the-record tacit understanding that I'm unaware of? What do other people really think about me? For pretty much anything that really matters, the important biases are those that you have about questions of this sort -- and knowing about the artificial lab scenarios where anchoring, conjunction fallacies, etc. are observable won't give you any advantage there.

Note that this applies to your biases about abstract intellectual topics just as much as to your practical life. Whatever you know about any such topic, you know largely ad verecundiam from the intellectual authorities you trust, so that chances are you have inherited their biases wholesale. (An exception here is material that stands purely on rigorous internal logical evidence, like mathematical proofs, but there isn't much you can do with that beyond pure math.) And to answer the question of what biases might be distorting the output of the official intellectual authorities in the system you live under, you need to ask hard questions about human nature and behavior akin to the above listed ones, and accurately detect biases far more complex and difficult than anything within the reach of the simplistic behavioral economics.

Of course, the problem you ultimately run into is that such analysis, if done consistently and accurately, will produce results that clash with the social norms you live under. Which leads to the observation that some well-calibrated instinctive bias towards conformity is usually good for you.