How about this: it doesn't matter.

If we want to build a device that only works if a certain theory is true, we can use it to test the theory. If not, you can do what you want either way, so what does it matter?

There's still similar useful problems. For instance: you can keep getting new data on economics, but there's no way anyone's going to let you do an experiment. In addition, the data you're getting is very bad if you're trying to eliminate bias. It can't be solved in that way, though.