Feels like this article was cut in the middle just before the interesting part, where he's supposed to explain why welding for construction was not automated a much and how all this is relevant to AI...
This author tends to write series on a topic, rather than a single article. This first one is probably just a background on welding and welding automation. The next part will likely delve into the specifics of construction welding, why it hasn't had the same level of automation, and attempts to change that.