Inconsistent use of square brackets in cmake CLI documentation

When you type an erroneous build command like cmake --build --config Debug (here I missed a directory after --build), you get a short usage description:

(env) d:\projects\videolib\build\vs2019>cmake --build --config Debug
Unknown argument Debug
Usage: cmake --build [<dir> | --preset <preset>] [options] [-- [native-options]]
Options:
  <dir>          = Project binary directory to be built.
  --preset <preset>, --preset=<preset>
                 = Specify a build preset.
  --list-presets
                 = List available build presets.
  --parallel [<jobs>], -j [<jobs>]
                 = Build in parallel using the given number of jobs.
                   If <jobs> is omitted the native build tool's
                   default number is used.
                   The CMAKE_BUILD_PARALLEL_LEVEL environment variable
                   specifies a default parallel level when this option
                   is not given.
  --target <tgt>..., -t <tgt>...
                 = Build <tgt> instead of default targets.
  --config <cfg> = For multi-configuration tools, choose <cfg>.
  --clean-first  = Build target 'clean' first, then build.
                   (To clean only, use --target 'clean'.)
  --verbose, -v  = Enable verbose output - if supported - including
                   the build commands to be executed.
  --             = Pass remaining options to the native tool.

Both [options] and [-- [native-options]] are optional in the CLI. Later in the same help we also see an optional [jobs]. Thus one can think that [<dir> | --preset <preset>] is also optional. This, combined with an unclear error message (Unknown argument Debug) makes it difficult to find out what's wrong with a command. This took away a lot of my time just now.

It would be nice to have a consistent usage of special symbols like []. E.g.: [] can be used only for optional elements and () can be used for grouping: (<dir> | --preset <preset>).

cmake version: 3.20.5 OS: Windows 10 x64.