It's not narrow minded, it's just to make sure that it's the best fit for both the chapter and the brother. Sororities are the exact same way. When you meet the brothers of the IU chapter, you may not get along with them, you may not have the same priorities, or you may just not want to be associated with them. As an extreme example, if you're a suspenders-wearing, pocket protector-toting nerd, you may not fit in with a chapter full of guys who more traditionally may described as meatheads and party 24/7. Until you meet the guys here, you really have no idea if you're going to like them.
If you're willing to discard your fraternity that quickly just because you have to be voted into the chapter, you obviously don't understand the meaning of brotherhood.