pro-communists want a system without competition. Pro-capitalists do want competition or at least no restrictions. People who are practicing capitalists would love to not have competition.
Think of a prize race. The people organizing the race and the audience want a highly competitive race. But the racers, if they are in it for the prize, would love to have little to no competition.
Artificial restrictions on who can do a thing is not good and it is violence behind, whether it is government or not.
Anarcho-capitalists are the true expression of the ideology of free markets.
I prefer 90% free 10% preventing monopolies, myself.