Is ModelResourceComponentBuilder intended to exclude fillable properties?

[KrisalisKAT]

In ModelResourceComponentBuilder@getPropertiesFromSchema, columns are filtered to exclude fillable properties

        return collect($columns)
            ->filter(
                function (Column $column) use ($resourceModel) {
                    return !$resourceModel->isFillable($column->getName());
                }
            )

That code has been in place for about 2 years, but it still seems to be an error. BaseModelComponentBuilder has a similar function, but has the reverse filter - including only fillable properties. And we're having to override the class to reverse the filter in order to get a corrected schema.

Am I overlooking a reason why this is intended behavior, or can that ! be removed?