To clarify it, what I mean by semantically relevant is if it is on the user requirements. It's not semantically relevant if it's there just to make the developer's life easier. So, it seems we are using the same definition.

Every kind of software has some error log, long lived servers tend to have some usage log too, databases tend to have journaling logs, and distributed computing tends to have a retry log. There are other kinds of them, like all those lines a compiler outputs when it tries to work on a program, or the ones a hardware programmer shows while working. Every one of those are there for the user.