The point of the article is that the market is not setting the commission rates. The commission rates are being protected by real estate commissions and misguided laws. Remove those protections and the market will find its way.
Exactly the problem is the laws. And luckily I believe the real estate profession is still relatively open compared to other areas.
I could easily see the government requiring a 4 year degree to get certified, and homes legally having to be sold through certified agents. Where the government also limits the total supply of those agents. That is how many professions are set up in America.