The description of Hashem "making" is part of Ma'aseh Bereishis. That is the items that were not part of the normal "laws of nature" that had been created during the first six days of creation had to be created just before Shabbos, which put a stop to "creation". The actual use of the tongs for metal work had to wait until people had developed their civilization to the point that they actually used the tools and procedures that had been "created" as part of the world.
The connection to the first question can be that people think that everything that they invent or build comes from their own cleverness, abilities , and strength. The "tongs" teaches us that everything that we might come up with are really built upon that which Hashem has created and made available to us. It is not "Kochi veotzem yadi" that has built the civilization that we have, but besides being "pygmies standing on the shoulders of giants", it is actually Hashem who has given us the talents, abilities, and resources to built what we have.