That's not quite the sort or debugging being discussed here though - they're talking general theory of how to think through a problem to locate the issue, which

That's not quite the sort or debugging being discussed here though - they're talking general theory of how to think through a problem to locate the issue, which applies to more things than just software including computer hardware, cars, circuit boards, just about any large system really - you do common things like replacing or disabling parts of the system, probing values at certain points, logging values, etc. For the most part, these things have a lot in common, but few people know how to approach such problems. It's interesting that I see them saying "the more talented the engineer, the more likely they are to hit a debugging wall outside of school". I was only ever a good engineer in school because I was able to debug. You don't understand something til you tear it apart.