The links show the reference, how to proper use the LibreCAD command line.
LibreCAD is an application, not an operating system, so why do you expect it works like a Linux terminal?
What shall Windows or MacOS user expect?
The LibreCAD command line works similar as command lines in other CAD systems, they can be a reference, but not the Linux terminal.
Experienced users have evolved and optimized the command line over years and there was never a request for positional arguments.
You can set "Evaluate commands when SPACEBAR is pressed" in Application Preferences, this might give the impression of positional arguments.
You should try this first, but of course you can open a feature request too.
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