The structural and civil engineering industries heavily rely on 3D structural modeling. You should bear in mind a few key factors.
Before 3D modeling, it was possible to convey what the architect or engineer wanted to build or interpret using drawings on papers or sheets, plans, elevations, sections, etc. which would be challenging and time-consuming for employees or clients to understand.
However, can you picture how a 3D model has greater impact than a sketch in terms of high detailing, realistic renders, etc, as it even enables the 3D modeler to test out several instances to assist him achieve the intended function?
The amount of software or off-site work that can be completed before having a thorough grasp of how the structure or building will be created, in my opinion, is at its maximum.
Just picture how an architect or builder feels when he already has a model of his creation that will come to life on the job site and is ready for maximal development.