Confused about FO4 Fallon's Basement origins

Becky Fallon (Fallon's Basement) merchant mentions in dialogue (in regards to her shop), "Yeah, it's ancient. There was a Fallon's here back even before the war. Granddad always said we had a tradition of quality and affordability."

She couldn't mean the actual Fallon's Basement she works in has been around since before the war though, right? Pre-war, it was a baseball stadium, so I am assuming she is referring to the other Fallon stores - not the one she works in specifically, right? Or do you think she was lied to by her grandfather, and she doesn't know Diamond City used to be a baseball stadium?

This is so dumb but I'm curious, I haven't been able to find other posts about this, and didn't see any answers on the wiki.