No data from disabled inputs

Is this normal or a bug? when i've got this:

 TextInput::make('name')->required()->disabled();

 TextInput::make('name')->required()->disabled();

 TextInput::make('name')->required()->disabled();

 TextInput::make('name')->required()->disabled();

The name is not there in

$data = $this->form->getState();

$data = $this->form->getState();

$data = $this->form->getState();

$data = $this->form->getState();