What actually happened [probably], in California: A heatpump salesman has a buddy that is a government official. Has outdated models he needs to liquidate. Salesman guy needs to be richer. Government official can't take the money directly, but sure would like to fly on salesman guys' private jet when they go golfing. Meanwhile government official guy goes and buys a bunch of Salesman company stock and profits explode…
On top of that, you can't have just any contractor install it, they need to be certified to install heat pumps, and of course the ones who are certified will only install a heat pump they sell you.
If you want a modern energy efficient heat pump in California, without waiting forever and paying several times list price, you're going to have to install it illegally.