Our sport future is more in the 40-50 year old age group. Far easier to recruit a 50 year old person to shoot doubles than a 20 year old. Here are my best reasons.

First by 50 you are starting to look back at your youth with nostalgia for all things as they use to be either real or just in your mind and doubles fit right into this. Second by 50 most of your lifetime major purchases are done, house, cars, several wives and many or too many kids so you have time to spend on a hobby. Third by 50 you have more discretionary spending money than you ever had at 20. And last by fifty reflexes are gone so you are lucky to get off two shots at a bird so a double works out perfectly.