But you'd still be in the same time zone, no? For different queries, like the one you mentioned, that might be reasonable, but asking for the time in London means the assistant should infer England's time zone, if you're in Ohio.
Unless you live in a state like Nebraska that spans across multiple time zones…
True, there are definitely edge cases to account for. Maybe the problem is these AI assistants are trying to make everything location-aware when that may not always be the desired behavior. If there are ambiguities the assistant could ask you to clarify, but that might make for a worse UX.
Just use your imagination a bit.
Maybe I live in state X at location Y while my parents live at location Z in the same state, about 250 miles away from me, maybe there’s a serious storm where I live and I wonder if I need to check on my elderly parents?