Only an organism of our dimensions and android design — 1.5 to 2 meters in height with arms about 1 meter-long ending in manipulative tools — can handle fire.
Being terrestrial is one obvious requirement. No fully aquatic species could master fire and thus develop metallurgy.
Without lignin, there would be no woody plants, no wood, no coal, no charcoal, no fire, no pottery, and certainly no iron or metallurgy.
Conditions on Earth, the laws of physics, are not only fine-tuned for the survival of intelligent beings, they are fine-tuned for the development of technology.
If the conductivity of copper were ten times less, wires would have to be ten times the cross-sectional area to provide the same conductivity.