In an ideal free market with perfectly-rational omniscient actors, this issue wouldn't occur. I don't think you even need the omniscience: trust, memory, reputation/vouching and basic game theory should be sufficient (though I haven't proven this). Alternatively: a free market with contracts, where all things go through the system, would work.
In the real world, the system consists of people, each of whom is optimising for a particular thing. Very few people are optimising for "make the most money, at the expense of all else". Show me anyone (even a billionaire), and I'll show you somebody who values other things higher than the accumulation of money. And plenty of things don't go through "the system of capitalism": we have commons, and volunteers, and favours, and coerced unpaid labour / wage theft.
"The forces of capitalism" might be a good shorthand for the reasons behind this problem, but it's not strictly an accurate one: these issues aren't inherent to capitalism. They're not problems with capitalism, but problems with this system. (Capitalism does have other, different problems that are pretty baked in, like how capital is power and power lets you accrue capital, but I don't see how that relates to this issue.)
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