And she has no way to know you are talking about AWS bills as she doesn't understand the language. Its intimidating, think from someone else's point of view.
Maybe to _you_, don’t assume other people are the same way.
Along my whole career path (I’m a senior now) I’ve always been curious about the high-level technical stuff and took every opportunity to listen to knowledgeable people.
I think there’s a term for it: incidental knowledge transfer.
You might be stripping that person of the opportunity to grow, or maybe just to hear about something interesting for them to follow up on later.
As for "incidental knowledge transfer" as you call it, there's another side of it: it's called distraction.