You’re a professional. You do good work – no, great work. How do you get that idea across to someone who’s never patronized your company? Simple: with your marketing.
Unless someone is already familiar with your work, what they see in your marketing materials is their first indication of what to expect from your company. If you send out a poorly designed postcard, customers will think less of your company – regardless of how little the quality of your marketing actually correlates to the quality of your work.
Take a look at this video, and tell me: do you think this postcard is doing everything it should to raise the company’s image?