Hmmm, there probably is actually a benefit to the other students there, but not “Harvard Experience.” Assuming the child of a previous Harvard grad is more like

Hmmm, there probably is actually a benefit to the other students there, but not “Harvard Experience.” Assuming the child of a previous Harvard grad is more likely to have important social connections than the average applicant, them being at the school gives other people potential opportunity to make connections through them. And connections do of course matter a lot. Regardless, the reason colleges actually do legacy admissions both seems obvious and isn’t something they’re likely to say. It makes Alumni happy, and keeping Alumni happy is how you get those fat $donations$.