Well, because there is evidence from the IPA Databank that better objective setting leads to more effective campaigns. Best practice is to identify exactly what business results you want. And exactly what you need people to think, feel and do in order to deliver those results.
The Databank also reminds us that reach and ‘Share of Voice’ (SOV) are crucial. No matter how well thought through your objectives, or how good your creative work, a campaign can’t deliver unless it reaches enough people. It’s also unlikely to succeed if it doesn’t outshout the competition. These are basic hygiene factors, but too often ignored by the wishful thinkers of marketing.
So let’s stop dreaming. By all means let’s be ambitious. But root your ambitions in knowledge and reality. Remember: ‘A goal without a plan is just a wish’.