Is it hard to guess why designing electronics could possibly be good/interesting work? It involves programming, design, physics, math, and making real things we use everyday - medical devices, cars, satellites, cameras, etc
They weren't trying to convince you that it's a pleasant occupation. I'm sure that the content of the comment would have a different emphasis if they were.
He was describing why doing QA is hard, and I'm suggesting (not to you clearly) some good reason for doing it still exists or he wouldn't be in that business.
Why?