>This is pretty much what the rest of the field thinks, anyway (example of this view in [1]).

Yup. I'm not a CV engineer myself, but I work in between our CV folks and pure software engineering. I've worked on automatic labeling and classification of circulating tumor cells (focusing primary on the imaging system(s)) for the last five years. Every experienced CV person I've worked with or spoken with dismisses DL out of hand for what we're doing. The less experienced folk jump right to a DL solution without understanding the problem domain.