undergrad business degree has no effect on MBA chances?

[sunnycalifornia]

im currently a freshman majoring in business at a top 15 undergrad school (US News World Report) and to be quite honest, the only reason is b/c I originally thought an undergrad business degree would help to get a MBA degree later, and that made logical sense to me. However, now that i'm learning more about MBA's in general people are telling me that an undergrad biz degree makes no difference whatsoever. Well, if thats the case, why shouldn't I change my major to something much easier and/or go exploring other majors to see what i'm interested in.

at this point, i don't realize or understand what the point of continuing my business major is, considering the business school here is ridiculously hard.