Why does ParseOptions.boolean only affect double-hyphenated options? (such as --flag but not -f)

[NSExceptional]

  /**
   * A boolean, string or array of strings to always treat as booleans. If
   * `true` will treat all double hyphenated arguments without equal signs as
   * `boolean` (e.g. affects `--foo`, not `-f` or `--foo=bar`).
   *  All `boolean` arguments will be set to `false` by default.
   *
   * @default {false}
   */
  boolean?: TBooleans | ReadonlyArray<Extract<TBooleans, string>>;

I imagine it is a pretty common occurrence to want to treat all short flags as booleans by default