And it wasn't like this when I bought my phone. I can't "opt out" of my phone. I already bought it before they required Google+ for Play's comments.
Have you tried using YouTube? They keep nagging you to open a profile.
etc. etc.
I want to post a tweet but Twitter wants me to create a Profile!
"I want to post a tweet but Twitter wants me to open a bank account!"
Your argument is invalid.
Also: they wouldn't be nagging me if I had no account. Did they nag you when using YouTube while logged out? They don't nag me when I'm not logged in.
Whatever Google says, they're just trying to impose Google+ as a social hub.
"I just want to register for courses, but my university wants me to make a .edu email address!" would be a better analogy. They aren't part of the same functionality, but the organization is moving towards one identity provider across all its services.
Could you imagine the nightmare for IT if email, library, VPN, course registration, brusar, Blackboard, facilities ticketing, software discounts, help desk, file server, 802.11X, workstation login, etc. were all separate usernames/passwords? There is a reason most universities have one central authentication service. My school's network IDs are even even integrated with ID cards so (as of next year) you can reserve space with your network login and then tap/swipe your ID to access it.
It isn't like Twitter asking you to open a bank account because Twitter doesn't also provide banking.