Okay, but real engineers can rely on the quality of their building materials, like mortar, brick, concrete and iron, with constant quality through decades or even hundreds of years.

Contrast that with the building blocks the 'software engineer' has to work with. Microsoft might upgrade some DLLs your product depends on, overnight. Will your product still work? Your application probably relies on components written by others. Are they infallible? Can you even inspect the components for defects?

I sometimes have the idea that software is built upon quicksand, and the building blocks can and probably will change before the project is completed.