The argument doesn’t depend on any ideas about which agents of change are the most important, just that certain of them are important.

Whether or not academic political theorists are trying to create social change is irrelevant to whether and how those theories can actually create social change.

Even though theory formulation happens within academic, there’s no reason that it can’t involve non-academics. Either way, nothing in the argument depends on whether non-academics can or should be involved in formulating political theories.

Who stands to gain the most from spreading political theories is irrelevant to the argument, which never discusses different people’s motivation or potential benefit.

This gets at the assumption that only non-academics are able to put political theories into clear, accessible language. If academics could do it themselves, then there would be no “special role” for non-academics to do so.