They aren't meant to. This is meant to clarify that money isn't essential to a capitalistic system. We can completely remove it from a process or interaction without it becoming less-capitalistic and more-communistic.

For instance, if I were a butcher with a steak to sell and you had an equivalent number of apples to trade for the steak, we could just complete the transaction by exchanging goods. Each of use selling the other person the good in exchange for money, would double the number of interactions, without making either of us wealthier. It would simply make the transaction take up more time, involve some third entity (whoever issued the money, even if that is the Bitcoin network), and raise the chances that the state will levy taxes on the exchange. The cost of the exchange rises considerably, as soon as money is involved.

What made the exchange capitalistic in nature, was not the involvement or absence of money, it was that it was _my_ steak and _your_ apples.