I think that that’s actually a common problem (not limited to dt/photography):
someone has learned to make images in a particular way, and changing those habits is hard.
Whether that is due to learning new things becoming more difficult with age, or whether it’s difficult to accept that the new methods give initially worse results than the old methods (for by that person!), I don’t know.
Or another reason might be a lack of patience for studying a new tool ("I know how to take pictures, why should I learn that again?’).
That said, when you just open dt to start editing, it is rather opaque, more so than some other programs (I only switched to dt on my third try…). Then again, rawtherapee scared the heck out of me when I had a look at that a few months ago (just out of curiosity, not thinking of switching, so no effort to understand the interface, let alone the individual tools).