You know I’m not sure where it all comes from CAN’T WE ALL JUST GET ALONG?!?
falls to knees dramatically reaching for the sky
But seriously, we all share one thing…the need to create and solve. Whether it be shoes, fashion, toy, electronics, transportation, medical it doesn’t matter to me cause the principles at the core are the same. I love all design 
and designing.
Ultimately I think that we (humans) like to group ourselves together. We search for others with similar interests, beliefs, attitude, humor, etc. I think this basic human nature just seeps into our design lives. People get caught up in their own field and never stop to think about the difficulties, differences, but most importantly the similarities to other fields.