You can do the whole process from mining and recycling to installation using solar power. Trucks, furnaces, cargo ships can all be electrified. The only reason we're not doing that today is fossil fuels are still cheaper.
I could try and explain 'energy return on energy invested' (EROEI) but what's the point? it won't make any difference.
I agree with a lot of what you say, except the bit about "cargo ships can all be electrified". It is more likely that they will use ammonia or hydrogen that are fully produced using only electricity (and some air/water).