Pretty much. And Apple had to roll its own maps because Google would not allow Siri to use maps. Apple Maps are pretty darn good by now, so I think it's safe to assume that Apple started building their own search engine for Siri well before it made a deal with Microsoft, and Bing is a stop-gap measure. Apple likes to own its core technologies.
Not really -- the Apple Maps vs Google Maps trouble started when Google refused to allow turn-by-turn directions until Apple started turning over more user data. If I remember right, Apple Maps launched "early" (before the deal with Google expired) in an effort to put Apple into a more powerful negotiating position.
And if they don't control it, it makes sense for them to have multiple viable alternatives. i.e., spread the money around and don't let one player get too powerful.
