This feels an overly technical objection? Very little of our problems are actually "impossible" if by "impossible" you mean something like "inverting a one-way

This feels an overly technical objection? Very little of our problems are actually "impossible" if by "impossible" you mean something like "inverting a one-way function". What I think most people mean is that moving production is impractical, e.g., that there is no realistic incentive that justifies making the investment and so for that reason nobody will make the investment, and production will not move, etc. It would be more effective to argue that the required investment is smaller than expected, and some particular entity does have an incentive to make the investment after all, etc.