I actually disagree that the first is true, in and of itself. If you have two otherwise identical candidates except one is a Legacy candidate, then the answer is (tautologically) no, having a parent does not make you more qualified. But it's also true that that being a legacy gives that student an advantage, even if its limited to just getting put at the top of the pile to be reviewed. And if a segment of the population has been historically barred from attending these institutions, then I think it qualifies as an "unfair" advantage.
Calling it "systematic racism" may bring with it a lot of other cultural baggage at the moment, but I think fundamentally we can at least agree that Legacy Admissions are a way of preserving the status quo, in opposition to social mobility.
1. does having a parent who is an alum make a student more qualified?
2. does having a parent who is an alum increase the likelihood of an applicant being accepted?