Why I remember back in the day's of my youth, 50s/60s, when there weren't hobby shops per say, least wise in So Cal, but there were toy stores and the Five & Dime stores that were my source for model cars and paint, and within walking distance from home. There was a train shop halfway across town but they didn't sell other models just HO stuff. So that may be where the association with toys come from. It's tradition.