Such as in the implementation of a JIT. There emitting the machine code directly is less bother than emitting assembly and much less bother than emitting C, compiling it and then loading it into the address space.
The low code systems being derided here are programming languages. They're languages you use to program computers with.
I suppose one could define "programming language" to be "a language for programming computers that is useful in some context", but they're pretty much all useful in some context. Maybe one could define it as being mandatory to use text editing to count as a programming language, but the smalltalk instances are something of a counter argument, as are the UML things.