Yes and no. The people negotiating the contracts for those steel workers probably work in a nice clean office. The steel workers won't have work without that other work also being done. Blast furnaces don't buy and install themselves.

There are also different kinds of work that don't require building things themselves. My whole career has been about inventing better ways to do industrial work. Improving efficiency of current operations in industrial settings makes huge amounts of money for the end customer. From the engineering side (where I work) it requires multi-discipline expertise, great organization and incredible attention to detail, among other things.

Yes, we regularly go on-site to environments like the steel workers', to talk to end users and get feedback on what is working well and what could be better. But most of the time we sit in a nice clean office, with climate controls, servers humming in a another room (shhhh...it is where I am right now!)

So, yes and no.