One example: Google is known to have a lot of people with CS degrees. Yet often, their software is astoundingly lame. For example, their voice transcription seems to have no awareness whatsoever of the names of people in my contacts, data that Google has full access to. This results in a horrific user experience for anyone who attempts to rely on the results. The problem here isn't what degree the engineer had. The problem is more about conscientiousness. Whoever did that system, does not care.
Myself, not having a CS degree, am keenly aware that people perceive that to be a weakness. So, partly in order to make up for that, but also just because of my personality, I care a lot about the quality of what I do, and I assess quality from many different angles, not only the angle of am I using the most efficient algorithm. I'm not saying CS people can't care, but non-CS people do have more reason to.