A lot of people in our industry haven't had very diverse experiences. So they don't have enough dots to connect and they end up with very linear solutions without a broad perspective on the problem. The broader one's understanding of the human experience the better design we will have.
To design is to communicate clearly by whatever means you can control or master.
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When I design and wonder what the point is I think of someone having a bad time in their life. Maybe they are sad and they wake up and put on something I have made and it makes them feel just a bit better. So in that sense fashion is a little help in the life of a person. But only a little.