I think that anyone who bicycles around motor vehicles is going to have a frightening moment or close call at some point. Riding on roads where one feels most comfortable will hopefully help keep them riding, and when they feel comfortable and experienced enough, move to more “active” roads.

There’s a road where I live that’s 25mph speed limit, very busy with cars, pedestrians, shops, intersections, crosswalks, and lots of people looking for on street parking. I’ve been cycling for years and that road still requires ALL of my attention and lightning reflexes to navigate safely.