I have answered your question several times and this will be my last.
The legacies generally fall in the 25/75 percentiles, making them like most other Emory students.
You know fairly well that most Emory students aren’t automatics and all in that 25/75 group have a 30% to 60% chance of getting in. Many qualified students, unfortunately, are not admitted to Emory. This same group, as @bernie12 points out, often get into other elite schools such as Wash U, JHU, etc. Some get into Emory who don’t get into those schools. The legacies fit into this subset, but get the legacy push to Emory. Many are motivated to attend Emory and benefit by applying ED as well and you are aware that ED1s get an additional push.
These are kids whose applications are similar to those who are admitted and those who are rejected. You don’t trust the Admissions Committee or the Dean of Admissions. That’s your call. I’d like to think they aren’t going to admit people they believe don’t belong.