For one, it’s ironically first being deployed in countries where DNS manipulation by the government isn’t happening (US first generally), but Google has competitive concerns with ISPs getting ad targeting data. I feel like defending against oppressive governments is being used more as an excuse than a driving motivation. The primary concern seems to be that Google really wants to protect its monopoly, and Firefox, as a major benefactor of Google money, has fallen in line.
And second, as an IT admin, I’m annoyed web browsers keep trying to develop new ways to bypass my network security.