I'd say it's the exact same problem. The structural engineers are looking at these pre-designed components as black boxes, not bothering to understand why they

I'd say it's the exact same problem. The structural engineers are looking at these pre-designed components as black boxes, not bothering to understand why they were designed the way they were, what they do internally. A huge portion of software engineers sees the components they work with (such as HTTP) as black boxes, too. This means that when the engineer is considering its use, they cannot effectively consider how it will hold up in the particular situation they are dealing with. You need to know at least nominally how the sub-components interact, or you can't predict how something will perform when you use it. Even the strongest abstractions leak a little bit.