>Regardless of what Google does within its own platform, he still compared what Google did on iOS to what Apple did on iOS.
And nothing, even on this part of his complaint, was about things that Google couldn't fix because Apple didn't let them.
So the "closed/someone-else's platform" remark was redundant.
FWIW, I have Android and when I downloaded and launched Hangouts it automatically logged me in. I assume iMessage was similar - but a third-party app wouldn't be for obvious reasons.