Unless you believe in the Lizard People, free market is responsible* for every economic system on Earth, including those with central planning, exorbitant taxation and draconian regulations.
TL;DR: Saying "free market will decide" is saying "whatever will be will be"--NOT interesting.
*If only by failing to prevent.
I can't speak to what everyone means when they say "free market", but I think this term is mostly used in this forum to mean "free" in the libertarian sense. That is, my freedom ends where it starts to impinge on your freedom, and vice versa. This means that a "free market" is explicitly NOT one in which you are free to restrict my economic freedom, nor I yours.
From context, I gather that your definition of "free market" is simply 'the exercise of free will', and thus much broader than the meaning intended by the people you are responding to.
From wikip:
What freedoms are you talking about, in particular? For instance, your notion that my freedoms should stop where yours begin seems overbroad. Can I take from you what I believe to be rightfully mine?