True, which is why I find it surprising the Bureau of Engraving and Printing has not done a series using the one or two dollar bill. I also question why the mint has never done a series of vice president coins.
Unless they’re concerned about saturating the market, they might be missing out on some easy money.
There are also artistic, or ego-boosting benefits from catering to the collector market. Commemorative coins are works of art. A “Mint State Perfect” coin showcases the employees’ workmanship.