you can make this assumption if you believe refined metals are fungible.
If making refined metals cheaper, it will also mean more of it available for green tech (that currently might be too expensive to produce to replace fossil fuels). On the other hand, more available metal ores do not make fossil fuels more economical (also an assumption, but i think this is fairly true).
Therefore, on the whole, this would make green tech more competitive with fossil fuel tech.
you can make this assumption if you believe refined metals are fungible.
If making refined metals cheaper, it will also mean more of it available for green tech (that currently might be too expensive to produce to replace fossil fuels). On the other hand, more available metal ores do not make fossil fuels more economical (also an assumption, but i think this is fairly true).
Therefore, on the whole, this would make green tech more competitive with fossil fuel tech.