How many C++ programmers grok CSS? How many Java programmers understand prototypes? How many enterprise developers are used to shipping code at least weekly? No CS degree I've seen has covered analytics, or even effective logging at scale. As much as CS-oriented coders look down their nose at web devs there are skills involved. If engineers can adapt there are huge payoffs sitting on the table, but they have to actually do so. There aren't very many who have, not nearly enough to meet demand, and so prices rise and companies swap from teaching web development on the job to teaching CS on the job.