A top level speaker company needs to advance the art. To do that they constantly refine and build the very best, cost no object speakers. They are critical in showing off what they are capable of. Then they substitute compromises to build speakers that are much less expensive, where they can sell many.
These cost no object speakers come with installation to make sure they sound their very best. I doubt they sell many, but they are priced to be profitable. A set goes to professional reviewers.
About thirty years ago I spent a couple hours with a set of Wilson WAMM… I think about $350K at the time… currently $685K. The experience was revelatory… I understood what Wilson was about and set in my mind what Wilson can do. It doesn’t happen to be the sound I am going for… but it is for many.
I am happy to sample them. I do not think they are over priced… some people have a lot of money… good for them. Most don’t care about audio, a few do.