Though I've never formally done work with the "ETL" label, what I've seen of it reminds me of the work I used to do for client years ago where I'd take some CSV file (or what have you) and turn it into something that their FoxBase-based accounting system could use. It was boring grunt work (or shall we say, "Charlie work"), but I billed it at my usual rate and it paid the mortgage. I would never, ever wish to make a career of it, however. (And if my assessment of what someone knee-deep in ETL does all day is completely off base, I apologize.)
BTW, that may sound polemic, but it's not -- that's really how a lot of business types, academic researchers, and others think of nearly all programming-related work.
Anyway, this is a shame. I thought "data science" still had nice R&D flavored jobs. Colour me disillusioned.
I do love reading an article that supports my contention that ETL is the Charlie Work [0] of software engineering.
0 - http://www.avclub.com/tvclub/its-always-sunny-philadelphia-c...