What I meant by that statement is that whatever you're asking about is actually coming from you. I don't think the simple statement in the comment actually contains any connotation. Just like the old programmer joke - there are 10 kinds of people in the world, those who understand binary and those who do not. We just like dividing people into classes because it helps us understand the world.
I guess to engage with this a bit more, one reason you might find a negative connotation towards engineers who are ignorant of the underlying details is that it is the larger set. After all, most engineers do not need to understand the physical layer in depth, so there are fewer who do. People love to feel like they're part of a smaller "higher" class, for complex social reasons. This sometimes comes with a bit of a distaste towards those who are part of the "regular" class.
But overall, I think you're taking this further than it really needs to be taken. The GP was just saying that not all network engineers are wizards in the technical details of lower layers, just like not all software engineers can write a compiler. Does that make them "worse" in some way? Well it makes them a worse fit for that few specific jobs that require that extra knowledge, but in general, I don't think so, and I doubt most people do either.
I guess to engage with this a bit more, one reason you might find a negative connotation towards engineers who are ignorant of the underlying details is that it is the larger set. After all, most engineers do not need to understand the physical layer in depth, so there are fewer who do. People love to feel like they're part of a smaller "higher" class, for complex social reasons. This sometimes comes with a bit of a distaste towards those who are part of the "regular" class.
But overall, I think you're taking this further than it really needs to be taken. The GP was just saying that not all network engineers are wizards in the technical details of lower layers, just like not all software engineers can write a compiler. Does that make them "worse" in some way? Well it makes them a worse fit for that few specific jobs that require that extra knowledge, but in general, I don't think so, and I doubt most people do either.
That's why we have abstractions.