Wrong. Nothing more need be said.
The possibility of a brokered convention is brought up and strategized for in every cycle.
In 2012
How a brokered convention could work
https://www.washingtonpost.com/blogs/the-fix/post/how-a-brokered-convention-would-work/2012/01/30/gIQAKTcAfQ_blog.html
In 2008:
obama-clinton-head-toward-convention-contested
A Brokered Convention?
http://voices.washingtonpost.com/44/2008/01/a-brokered-convention-consider.html