I believe one of the problems it solves is that steel has a tendency to erode over time. Hence major infrastructure failures. If structural elements can be made

I believe one of the problems it solves is that steel has a tendency to erode over time. Hence major infrastructure failures. If structural elements can be made to the same strength as steel, using HW, which will not erode at the same pace of steel, than the expected lifetime of a structure increases and that is solving a real problem.