What do top colleges have against transfer students?

@Vincent1997 USC does seem to be one of them. I know of 2 students that received the transfer option they provide. I know they also admit quite a few people coming from California community colleges. I personally don’t know much about USC and the UC schools, I know USC and many UC schools attract high-achieving student. However, the 2 students I know that received the transfer option really did not have great grades, scores, or anything stellar at all. Not quite sure what’s up with USC. Perhaps they were simply outliers.