I agree (mostly) but not sure how that applies to my comment. Yes my major frustrations with it is that it isn't able to form a helpful response, not that it gets the actual words wrong. And in the case above, it goes beyond that. Designers of the product (Google maps) have it present onscreen options you need to click, in response to a spoken request (e.g. "find gas stations on my route") that is likely to be by a person who is driving and should not have to look at a screen. I would argue that that is not just non-helpful, but irresponsible and unsafe.
But I guess you are right, in that if they have the transcripts, they don't need to actually listen to recordings. Then again they might need to listen to recordings if they are trying to gauge user frustration.