I think there are a few ways to look at the question, and I may have had enough beers after a huge presentation to take a stab at my opinion.
1) What do we think we mean to society?
I think we are at our best when we study the way people live and create products that help them do that, from medical devices that are easier for technicians to use and less intimidating to people, to cars that do more than just move people from point A to point B.
2) What does society think we mean to them?
Honestly, probably very little. Most people can put together (with a little explanation) what a shoe designer, toy, or car designer does, but most of them never think twice about that ballpoint pen in their hand, their computer, their watch, their alarm clock or anything else around them. It's not that they think we are not important, its that they don't think about us at all. We are removed from their day to day life, unlike the blacksmith and other craftsmen people used to go to for their products.
3) What do other functions like marketing and engineering think we mean to society?
Some of them get it, some of them do not. The good ones know we help strategize business opportunities into market realities, and help figure out the manufacturing and commercialization process. The ones who are not so good think we draw pretty pictures, put candy wrappers over things, and make their jobs harder.
Hope that helps a bit.
Michael DiTullo
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www.michaelditullo.com
"To give anything less than your best is to sacrifice the gift" Steve Prefontaine