Logic is, in this respect, like a traffic cop. He or she can tell you when you've done something illegal, but they can't tell you where your destination lies or how you should get there. They can't tell you not to take the scenic route but to use the highway instead. They can't tell you to get a smaller car or how to relate more effectively to your kids. So logic represents a minimum set of rules to help avoid certain basic kinds of accidents or misfortunes, but it does not tell us where to find what we're looking for or even whether or not we've actually found it.
Psychology is a science based on experimentation or statistical surveys.
And to adapt a remark by Robert Frost regarding poetry, we can say that life, in all its complexity and ambiguity, is precisely what is left out in a carefully controled experiment. Furthermore, statistical surveys, which strive to measure the beliefs and attitudes of large numbers of people, are no substitute for the work of a skilled observer. Human direction, therefore, requires a combination of work on the part of dedicated observers and confirmation from people in their everyday lives who either find the tools developed by those observers to be useful or not.