I think it is useful, and that’s a perfect way to describe mainstream economics. What’s frustrating (but predictable) is that there exists an entirely separate branch of economics which makes much more powerful observations about the fundamental nature of capitalist economics, including politics, power, and sociology. But Marxist economics are simply excluded from the Western economic tradition because it makes value judgements which directly and dangerously controversy the interests of the ruling capitalist class. In a healthier world, elements of mainstream economics would be combined with the fundamental Marxist critique of capitalism to produce new systems that are more efficient and less exploitative.