The current embeddable forms autofocus to the first field of the form wherever it may be on the page. This functionality is inconsistent across different browsers due to the way they deal with the autofocus script. Some will ignore it because it is coming from a separate host domain, and some will happily scroll you to the bottom of a page, skipping all of the copy to get to the form.
The fact that this interactivity is inconsistent at all across browsers makes it clear to me that the ability to disable the autofocus on our forms is an important feature to have.