Karl Marx was never "in charge." He developed a framework for analyzing Political Economy in a manner useful for the Proletariat to identify the manner in which we are exploited, and how we may go about defeating the Bourgeoisie. There are no rich oligarchs replacing Marx.

Belief systems certainly can be exploited, but that isn't the point you are making here. Your point is that we should disregard analysis of Political Economy in favor of vibes-based action. If you don't do the effort of studying Political Economy, any conclusions you come to will be based on shaky foundations, rather than throwing theory aside, we need to weild it to guide correct practice.

Funny enough, Mao described your error over half a century ago, in On Practice:

The second point is that knowledge needs to be deepened, that the perceptual stage of knowledge needs to be developed to the rational stage -- this is the dialectics of the theory of knowledge.[5] To think that knowledge can stop at the lower, perceptual stage and that perceptual knowledge alone is reliable while rational knowledge is not, would be to repeat the historical error of "empiricism". This theory errs in failing to understand that, although the data of perception reflect certain realities in the objective world (I am not speaking here of idealist empiricism which confines experience to so-called introspection), they are merely one-sided and superficial, reflecting things incompletely and not reflecting their essence. Fully to reflect a thing in its totality, to reflect its essence, to reflect its inherent laws, it is necessary through the exercise of thought to reconstruct the rich data of sense perception, discarding the dross and selecting the essential, eliminating the false and retaining the true, proceeding from the one to the other and from the outside to the inside, in order to form a system of concepts and theories -- it is necessary to make a leap from perceptual to rational knowledge. Such reconstructed knowledge is not more empty or more unreliable; on the contrary, whatever has been scientifically reconstructed in the process of cognition, on the basis of practice, reflects objective reality, as Lenin said, more deeply, more truly, more fully. As against this, vulgar "practical men" respect experience but despise theory, and therefore cannot have a comprehensive view of an entire objective process, lack clear direction and long-range perspective, and are complacent over occasional successes and glimpses of the truth. If such persons direct a revolution, they will lead it up a blind alley.