I did not, nor would I dare try to change the definition of "legacy." Of course I'm using a rather old dictionary, but it defines "legacy" as: 1. Money or other property left to a person by a will. 2. Something that has been handed down from an ancestor or predecessor.
None of these things apply according to the definition, but then, neither does your version of "legacy" apply. You, it seems, are the one who has tried to change the definition. And while there may be some other word she could have used instead of "legacy," there was no intellectual dishonesty either.
cheers