Can you tell how long they wasted on the debugging aspect?
Nope. That's the problem. These are soft skills that are hard to teach but much harder to test.
And print statements are sometimes the superior choice.
This ties into my other comment that these things can be heavily subjective. As long as it gets the job done, I prefer print statements used by somebody who uses them as a sharp knife to gain understanding of what's going on over somebody just clicking buttons in a fancy UI but has no clue. (And vice versa, obviously.)
Print debugging is sometimes useful but sometimes indicate the person doesn't know about tracepoints/logpoints.