Duni

I’m sorry but that I think that’s just wrong. She can enter the US using the visa. The F1 visa is NOT school-specific, although it mentions the name of the school. She has to have documentations (I-20 of the new school, and financial documents,... ) and answer truthfully when asked, but yes, she can enter using the visa and the I-20 of the new school.

From the official source:
 
If you have arrived in the United States but want to transfer to a new school before you begin classes at the school listed on your Form I-20, talk to the DSO at the school listed on that form. You need to inform the DSO that you have arrived in the United States and want to transfer immediately to another SEVP-certified school. You must show proof of acceptance to your new school. You must report to your new school and enroll in a full course of study within 30 days of arriving in the United States.
 
https://studyinthestates.dhs.gov/instructions-for-transferring-to-another-school-as-an-f-1-student