> Not sure where you are getting with this. Yes, literally speaking they can, but what matters is if they actually do,

And, despite the fairly consistent bias people used to working at lower levels of abstraction have against people who usually work at higher levels, we all work with some level of abstraction, and most people gain experience at lower levels by dealing with problems that emerge, and those that don't don't fail to do so because they can't but because they choose not to bother either because they have other people that they can rely on for lower-level problems, or because they aren't interested and are doing things where they can afford to simply change what they are doing in response to those problems.