That’s somewhat of a strawman.
What we do is accept the obvious. People only killed passenger pigeons because other people payed them to kill passenger pigeons. We don’t need for the market to ‘hit upon a way to do it’ as you put it. The way to do it already existed inherent in the market. If people had wanted to save the passenger pigeon they could have simply stopped buying. It really is that simple.
Of course this hinges on people having access to all the information required to make these decisions. But that isn’t at all relevant to a thread pertaining to the benefits of capitalism. All systems rely on information to make good decisions and capitalism is, if anything, better at disseminating information.
But if we assume that people were acting in an informed manner then it’s a sad truth that people didn’t consider the passenger pigeon worth saving. Just because you think it’s a tragedy today doesn’t mean that it was a tragedy. All resources will eventually be consumed, that’s a given. Passenger pigeons were always doomed to extinction. The question is whether we consume these resources wisely or squander them. We can never save them.
The people at that time made the decision that the wisest way to consume that particular resource was as a one shot, cheap and expendable resource to fuel growth. That is no more ridiculous than an alternative decision to harvest them carefully for a few hundred or million years and then have the species vanish anyway. They are simply alternative viewpoints.
The people of the time had the option of not consuming the resource as rapidly and they rejected that choice. Just as you personally right now are rejecting the choice of consuming fossil fuels more slowly by not using a computer. You pay for your computer and the electricity it uses and in that way you as part of the market control conservation. That is what prevents headlong exploitation of a finite resource. If people don’t like the rate of use of a resource they don’t have to use the resource at that rate.
You have decided that the pleasure you get from the SDMB is worth depleting the world’s fossil fuel reserves that much quicker. That’s your decision to make and nobody can tell you it is wrong. And in exactly the same way someone 150 years ago decided that the pleasure they got from pigeon pie was worth depleting the world’s pigeon reserves that much quicker That was their decision to make.
Where people so often go wrong in these matters is an implicit but unstated assumption that somehow conservation equals preservation. As though somehow if we don’t consume these resources as fast they won’t vanish when the sun expands and engulfs the Earth. When you accept the truth, that all resources will vanish ultimately and all we get to decide on is whether we squander them, utilise them wisely or leave them to rot, then the question becomes much clearer (and paradoxically harder to answer).
Perhaps the real question is “What does Mangetout think the pigeons should have been saved for?”. There are lots of good answers to that question but until you and all other members of our society agree on the answer we can’t say whether they were worth saving. Society at the time decided they weren’t worth saving and voted with their wallets. Who are you and I say they were wrong?