Apple chose to use google as their default search engine, because they don't care about your privacy anymore than Google does.
Just because Apple could do better doesn't make them the same as Google. Take web browsers: Safari could do better, but they were the first to limit tracking cookies, and they took some hits on compatibility to do so. Chrome is now also limiting tracking cookies, but only for other people because Chrome quietly includes an almost unique set of experiment flags, but only when talking to Google owned sites. This is why I can't trust Google.