If prices drop to MSRP at all dealers, you will see wait times jump back up to the 2-3 year mark like they used to be. The economic reality is that prices will rise or fall to achieve market equilibrium.
As long as demand exceeds supply, bikes will continue to be sold at a premium. These dealers are not bad people, they are doing exactly what they should be doing - attempting to maximize profits, which is the hallmark of a capitalist society. It is the goal of every business to maximize the wealth of the owner(s). That is the sole reason businesses exist.
If you want to point a finger, point it at the MoCo. Their production lines have had excess capacity for years. They can easily produce enough bikes to satisfy market demand if they want to. But they don't want to, because they know that part of the allure of a Harley is the relative difficulty in acquiring one. That appeal spurs demand, which supports the MoCo, the stock price, their dealers, and the used market.