I wish I had your optimism, Guy. I don't see Tesla installing CCS plugs for a while. For now, having the supercharging network helps them sell more cars. I know of people who would rather have bought a Bolt, but chose a Model 3 for the supercharging network, for example.
In a few years, when EA + EVGo + ChargePoint + others start to approach the coverage that Tesla has, that advantage will be gone. At that point, it would make sense for Tesla to open their network and sell electricity to other drivers as well.
Back in 2016, when Tesla first showed the Model 3's charging port, the first thing I noticed was how large it was. I'll admit, I was hoping that maybe they would release the car with a CCS plug. While that hasn't happened in the US, it has overseas, as you point out. This is encouraging indeed. Hopefully the next iteration of the S/X design follows suit with a larger, more accommodating charge port door.