This distinction was not invented by Marx. In fact a lot of Marxism was invented by Marx; most of it was an extension of the prevailing classical economics. He read Smith and Ricardo.
The key problem with original Marxism, as it was with classical economics, was relying on the labor theory of value. Marx runs with that to come up with a theory that says some people are systematically skimming the value generated by others and that a series of cyclical crises will cause the total collapse of capitalism at some future date.
Every time there's a market crash or a recession, Marxists bestir themselves to tell us all "I told you so!". The problem is the same as the Rothbardian Austrians blaming it all on the Federal Reserve or Keynesians saying it's a slump in demand. Too simplistic. (I'm a Hayekian, an economist who put "I can't explain particular examples and neither can anybody else" at the centre of his theory of economics).
Complex, chaotic systems naturally move around their phase space, often with large oscillations. That's the bottom line. You can't eliminate the boom/bust cycle. It exists in every industry and always will. Sometimes bigger industries go through the cycle and everyone feels it.