You quoted someone talking about what Karl Marx said, and totally ignored the actual Karl Marx quote, InFact you ignored the entire argument of what Karl Marx was right about and threw a Red Herring, i.e. arguing about something totally unrelated.
K. Marx was a dangerous kook.
Reading Marx is like taking an ink-blot test. One sees much that is not there. People who believe Marx was right, well, they are just as wrong as he was.
Marx's observation that the worker under capitalism is a mere commodity was on mark. The object of labor do not exist for the sake of the worker, but the worker exists for the sake of the objects of labor. Thus the worker's labor becomes an alien object which confronts him and over which he has little or no control. Thus, the worker wanders from place to place, like a pitiful puppy looking for a home, seeking employment. Frequently, he must take whatever is offered to him, regardless of whether it is something he likes or not. If he does not like what he is given, he must endure regardless, as there is no sympathy. If he complains, he is labeled a cry baby. And even if he may take some satisfaction in his work, he is confronted constantly with the fear of unemployment, because the capitalist cares little about him as a person, but rather how much surplus value can be extracted from his labor.
If one does not want to be a commodity then rise above. Get a skill people are willing to pay for. Marx was an idiot. Fortunately he is a dead idiot. Unfortunately society's losers continue to see something there that really is not there.