However, what it does do is allow some things to be possible that weren't.
Value comes from making things. If you're not actually making things and are just shuffling numbers, you're not adding value. All value basically comes from labour, when you get right down to it... it's the addition of labour to raw materials to make goods that create value.
Capitalism isn't about creating value. What it IS about is organizing labour to make value possible on a larger scale, by allowing people to more efficiently pool resources to do so, and making apportioning the rewards from the created value easy to figure out.
Basically, I'm a Marxist, in that his analysis was bang on... it was just his prescription that was completely messed up, seeing as it relied on magic to make it happen (worker's consciousness blah blah blah). I have yet to see anyone make a convincing refutation of his argument about the end state of capitalism.
All that said... I like capitalism, but I understand what it is, and what it is not. What it is is a method for organizing labour, raw materials, and tools. What it is not is a magical place where good results (or even efficient results) are guaranteed, nor an evil system that enslaves people. It is simply a system of organisation, no more nor less.
It is reasonable to give some of the value created by labour to the people that put capital in place to do things because of the gains in efficiency... but all wealth comes from making things. I have thought for several decades now that industrial policy in English-speaking North America (yeah, there are French people in there too, but you know what I mean) has been insane for deeply advantaging the people that organise the money over the people that do the work, because when all is said and done all wealth comes from making things, and that is something that is done by people. The only thing that capitalism is good at is making it easier for people to do that.
Once we stopped making things here, it was only a matter of time before we became poor. Shuffling the paper around to paper over that fact was rearranging the deck chairs on the Titanic. This crash was inevitable once we stopped creating actual wealth in North America. The particular mechanism that did so (CDSs and CDOs yadda yadda yadda) is strictly circumstantial to that central truth.