No it doesn't.
First, the theory of supply & demand is, like biological evolution, a description of how things naturally tend to happen (under certain conditions), not a divine decree of how they should. People who actually do understand what supply & demand really is & does don't worship it as a divine source of ultimate economic guidance & morality any more than people who actually do understand what evolution is worship evolution. (The difference is that, for supply & demand, as anybody claiming that it shows what things are "worth" demonstrates, the worshipers actually exist instead of just being figments of their opponents' imagination.) Even with all of the conditions of the theory perfectly met, the result would be "the point at which the quantity supplied equals the quantity demanded" regardless of the results of making that match happen, not an infallible cosmic "worth" for people to be sacrificed to.
Second, as anybody who ever actually had taken and learned from an actual economics class instead of just a right-wing talk show's blather about it would've learned on the first day, one of the required conditions for supply & demand to even function as described anyway is "perfect competition", which has its own Wikipedia article of roughly the same length as the one on supply & demand. And one of the first, easiest, most obvious examples of competitive imperfection, which breaks the whole supply & demand thing so it doesn't even work as described anymore anyway, is when suppliers have inordinate market power, depriving demanders of the freedom to chose (1) not to demand or (2) which supplier to go for their supply. It essentially makes demanders' "choices" the kind of "choice" you make under threat of death, and that's no actual choice at all, so the conditions of supply & demand are not met. It simply was never meant to describe how much you can extract from people under threat of death. The theory then works about as well as evolution would after the Earth or sun is completely destroyed. (And that's how well it would work at even generating its actual output, "the point at which the quantity supplied equals the quantity demanded", not some imaginary decree of what something is "worth" and thus what the people sacrificed to it are "worth".)
What you've been spouting is not the actual theory of supply & demand. It's dishonest right-wing propaganda about supply & demand which suppliers propagate to keep demanders subservient.