It's more akin to visually composing a scene for a film, dux. Just because you're not building every piece doesn't mean your overall ability to direct the art isn't very important (in a lot of films there's no scene building at all -- it's all on location). As more stuff is procedurally generated in the future it'd be wise to appreciate this rather than (presumably) thinking 'oh all he's done is put together a load of props'.
I think as games technology progresses, an eye for a good scene will become increasingly important, and the actual process of building it much less so. That, or the job roles will just be completely separated.
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