Because it is possible to use webforms to collect demographic and other sensitive information from users, IT does not make the webform content type available to all users. If you want access to the webform content type you must attend an IT training on the subject. These are normally held three times per year, once before the start of the fall semester, once during Interterm, and once over the summer. Check the IT Training Calendar to see whether the next training has been scheduled and to sign up.
If you can't wait for a training, or wish to request a focused training for your department, contact AskIT. Also contact AskIT for questions about existing webforms.