Django and default permissions?

[Fabio Caritas Barrionuevo da Luz]

Why of the core developers of Django does not include a "view only" permission by default?

Django creates by default has permissions add, change and delete, but does not include permission to view.

for example, the user can only view a form, but can not edit it, ie, the save will be disabled, and input fields generated by the form will be read-only

It seems that in django 1.7 will be simpler to modify[1] the default permissions

[1] https://docs.djangoproject.com/en/dev/releases/1.7/#models