Magento getModel can not initialise an instance whose class requires more than 1 argument.
I assume Magento native classes can explode options from the first argument to satisfy getModel. However, if I want to use 3rd party class like Zend_Form_Element inside Magento, there is no ways to use getModel to achieve the same result as
$element = new Zend_Form_Text('name', $options);
$element = Mage::getModel('moduleName/modelName', 'name');
takes 1 argument which is ‘name’ only. No way to pass $options on.