Had a long talk with "Coach Jerry" today, who explained a lot about this to me. He is involved in organizing races here, and has been for some time now.
I asked him why it's usually a 4/5 race...because IF there was actually an entry-level "5" event, then that would be fine with me.
He agreed that 4/5 can be intimidating and not a good start place for racers. He also agreed that it should be more important to allow these entry-level racers a place to get started in a 'true' 5 event. But it's not a perfect world....
Why doesn't it happen?
They want large fields.
They want programs that aren't too long.
How to change it?
Get a groundswell of people like me that would like to get into a true "5" event as beginner racers to voice that to the people who promote races.