Again, decision theory/game theory are not about “executing a knowable strategy” or “behavior selection according to legible reasoning”. They’re about what goal-directed behavior means, especially under partial information and in the presence of other goal-directed systems. The theory of decisions/games is the theory of how to achieve goals. Whether a legible strategy achieves a goal is mostly incidental to decision/game theory—there are some games where legibility/illegibility could convey an advantage, but that’s not really something that most game theorists study.
Again, decision theory/game theory are not about “executing a knowable strategy” or “behavior selection according to legible reasoning”. They’re about what goal-directed behavior means, especially under partial information and in the presence of other goal-directed systems. The theory of decisions/games is the theory of how to achieve goals. Whether a legible strategy achieves a goal is mostly incidental to decision/game theory—there are some games where legibility/illegibility could convey an advantage, but that’s not really something that most game theorists study.