The point of these products is to use a natural language interface to accept freeform questions and produce intuitive and potentially complex responses.

Weather was just an example. You can't predict every combination of weather related questions that someone might want to ask and force those into predetermined response strings.

The idea is to be able to ask things like "What days this week are best for having an afternoon picnic?" and get a reasonable answer back.

If your goal is to hide as much of your personal information as possible from 3rd parties, you're not in the target audience for these products. Nothing wrong with that, it's just targeted at a different demographic of people.