I enjoy it, too. I completely understand your point, and you would know best.
But I also think about sires like, say, Congrats… who stands for peanuts. Who appears, to my uneducated eye, to sell darn well when the stars align with a nice foal out of a quality mare. But then he gets a slew of cheap mares by merit of his fee who drag down his figures and never amount to anything.
Or even someone like Kitten’s Joy, who is still breeding 150+ mares, many of them garbage. The market gets flooded with these undesirable offspring and no one benefits.
Or when you lose your hat over having the “worst” foal of the sale by a top tier sire. You still might have the “worst,” but if there are less to choose from, isn’t that going to drive up price and mitigate that loss?
Limiting books could also redirect some higher quality mares into regional programs, as fees go up and they are squeezed out of the Kentucky market. Very few regional stallions would be directly impacted by a cap on books, but have a lot to gain if mares are out-competed for seasons in Kentucky. Maybe it would breathe some life into those breeding programs. While I frequently criticize their quality, I do feel they are valuable for the sport on the whole.
I’ve never understood how anyone except the stallion owners in the present benefit from 240+ Into Mischiefs (or any big book stallion) potentially coming into the world every year. Supply and demand suggests everyone would benefit from reducing the supply and increasing the demand.
Now, the genetic diversity argument I think is silly. That’s an argument for capping books that I can’t get behind. Only because thoroughbreds haven’t been genetically diverse since, uh, ever. We really only have three active sire lines in the entire country period, regardless of what stallions attract the biggest books.