Business majors also take an intro to IT course. I guess you can take comfort in that! Seriously, post number 2 is correct. In order to be a successful IT professional, you have to know the basics of business. Businesses will hire you to organize their systems, and if you don't understand the basics of how a business operates that would be difficult to do.
I would guess that you are required to do an Intro to Business course because so much of IT is connected to business. If you become an IT expert, you might very well end up working for a business. If you are really good, you might end up creating your own business. Either way, it is fairly likely that having a grasp of basic business concepts would help you with your career in IT.