Action and production
Book VI distinguishes making from acting. A productive skill can aim at a separate result, such as a house, while good action also concerns the quality of acting itself.
Practical wisdom differs from knowledge of necessary, unchanging objects. Its deliberation concerns things open to human action and capable of turning out otherwise, requiring judgement about circumstances.
References: [1]
Why general knowledge is insufficient
Aristotle illustrates the issue through food: knowing that a kind of food is beneficial is insufficient if one cannot identify particular foods. The example concerns judgement, not modern dietary advice.
Experience matters because circumstances become familiar through encounters. Reciting a general rule does not ensure recognition of the people, occasions and conditions to which an action must respond.
References: [1]
Individual, household and city
The discussion extends beyond short-term personal advantage to households, legislation and political deliberation. Pericles serves as an example of judgement about both oneself and shared life.
The question is therefore not only how to reach any selected result, but which actions and forms of life are worth choosing. Practical wisdom belongs with character, desire and deliberation rather than detached technique.
References: [1]