Can't put them on the market
These apps are Google's leverage against the carriers. They need to have signed agreements with google to distribute these phones. We've all dealt with mobile phone operators, and I'm sure you'll agree that I can't describe them here and get past the moderatrix.
I trust Google's "don't be evil" (even if it's not as strong as it used to be) over T-Mobile any day. These are the same people who are slowly having their business eroded by EU regulations banning their excessive charges.
These apps need to be impossible for end users to get, otherwise why would carriers want to get into bed with Google? It's a shame they've gone after this, but I can see why they've had to.