This is a job for people like me: product / project managers who work on a project to translate business (and audience!) needs into specifics around design and build. It's a skill all of its own, and it requires time and effort and expertise - it won't just emerge naturally, it won't happen without time thinking about strategy, audience, metrics, goals.

We spend a whole bunch of time when we're running projects pushing back and telling clients to "think less like you and more like your audience". It's not surprising to me that clients come with pre-set notions: of course they do, it's their business, they're in it all day every day, and they're thinking about it all the time. This doesn't make them good at thinking about this stuff from alternative / audience angles!