Capitalism is an economic system that primarily serves to benefit those who own capital.

If you don’t own any capital and you advocate for capitalism that means you are advocating against your own class interests.

Labor creates wealth. Laborers who create wealth are entitled to the fruits of their labor.

To believe in capitalism is to believe that the capitalist is entitled to wealth that other people created.

This relationship is naturally exploitative because the worker does not get to share in the full value of wealth that they created, instead they are given an arbitrary fraction of that wealth in the form of wages.