Why Cloud isn't used for IT projects?

Traditionally making changes to software requires a tedious process of waiting on the IT depart to make any seaming little change. We in IT no that even the smallest change requires impact analyst. However, with Cloud based software like Facebook, SalesForce, LinkedIn, Google, and more, the IT department doesn't need to maintain and ignores the software.
For example, Marketer may be able to update the companies Facebook page with no help for the IT department; as a result the IT department is not kept in the loop as to what happens on Facebook. Therefor the Cloud Admin works in a silo without creating system documentation, collaborating with other IT, or being included in the companies current and future Roadmap plans.
Similarly SalesForce or other Clouds that could be used for company wide IT projects are seen as managed by the users; and therefor not considered or more importantly evaluated by the IT department. By being too easy for the user to use, the IT department does not need to be involved with the software, and therefor focuses on software that requires their attention. This results in a lack of interest and skill on the unfamiliar cloud & ultimately limits its use and growth to what the user can do on their own with what ever free time they have to do it. Further more, the cloud software admin is usually doing jobs so the time spent on changes is rushed instead of thought out for impact analyst.
Like it of not, the new Cloud admins may be part time with primary job as a Marketer, Coordinator, Administrative Assistant, or other. This means they are part of the IT department and should be included in the IT discussions for future company wide IT projects, and Cloud platforms considered as useful tools. The IT department doesn't need to learn how to develop in every platform as most of these don't require maintenance and you can always find a temporary contractor to find to do the work. Like with Agile development its the collaboration and impact analyst that is most important to the successful implementation of any project.