It's so obvious it's vacuous. In order to be able to get many criminals behind bars, you will have to accept innocent casualties. The only way to be sure that no innocent folks are sent to prison is by not convicting anyone. The cost of that solution is obvious and unacceptable. Any principle that ignores the trade-off that must necessarily be accepted is vacuous.
Where did anyone say that no innocent people must be sent to prison? I said that punishing the innocent is worse than not punishing the guilty. But you show that strawman who's boss.
1/10 is actually a pretty low standard for wrongful convictions so I don't see why we would interpret what Blackstone said, or even Ben Franklin's 1/100, as hyperbole. They clearly meant that exhonerating the innocent is much more important than convicting the guilty and there is no good reason we can't adhere to that principle in practice.
There is actually a very good reason: given that it is unlikely that we will miraculously find a way to change the ratio of wrong to right verdicts, you can only lower the amount of people wrongfully convicted by lowering the number of convictions. As most convicted people are actually guilty, that means that most of the newly unconvicted people are, in fact, guilty.
Assume that currently 1 person is wrongly convicted for every 10 guilty ones that go free and try. Do the math to change that to 1 in a 100 and be affraid of the consequences of putting this principle into practice.
And again, note that you are not talking about changing the ratio of wrongful convictions to right convictions, because that is highly unlikely: you are talking about changing the absolute amount of wrongful convictions by allowing a larger amount of wrongful exonerations. Because of the ratio of the amount of people involved, the amount of guilty people that would need to go free is staggering. You need thorough Bayesian reasoning to understand this one.
The problem is that even fewer people appreciate more realistic (and with enough additional research, potentially actionable) formulations such as, "We have calculated that it is precisely as bad that 13.37 guilty persons escape, as that one innocent suffer."
