Analogy

You see? For most of the patients, high blood pressure is the result of a number of contributing factors in combination. Some of these factors may be reversible, others not. Nonetheless, it is not necessary to understand all the factors thoroughly and deal with each of them if our aim is to bring down the blood pressure.

For the same argument, we may not have to understand and take care of all contributing factors to the low morale in order to improve it. In fact, an extensive knowledge on the cause may hamper the design of a solution because we will easily find ourselves lost in the jungle of information and the irresistible tendency to deal with each individual factor.

Another psychological trap - and Principle #2: If a problem has many contributing causes, the most efficient way to solve this problem is to devise a novel strategy without considering individual causative factor.

PS. It is obvious that this tactic does not apply to all problems. In general, it should work if we are dealing with a (theoretically) quantitative parameter, for example, blood pressure, blood sugar, or morale - which we could imagine it is measurable, but we just don't know how.