Using Mac OS and Windows is nice, but expensive because of all the non-phone related services. My phone does not need an IE Internet browser, Microsoft Word, etc... You know why the Iphone is so famous? Because it's IOS is custom designed for it. If you removed the Iphone name, then it would be a lot cheaper than most phones. You are paying for a Computer OS on a phone.
Google, which most smartphones operate on, is part of PRISM, which means they could use data against you. Added with the fact that if for any reason Google fails, then smartphones won't function properly minus basic functions, which many see as irrelevant due to the Internet. Compare it with a non-smartphone; a Nokia 2730c would still have its snazzy features as long as your manufacturer and operator are still there. Smartphones need the extra corporation to be involved.
"Google [..] is part of PRISM, which means they could use data against you." That's a misunderstanding of PRISM. Through PRISM, the NSA is *passively* getting a copy of every piece of traffic transmitted into and out of Google (something Google has sued to be able to publish details about). They (the NSA) do the exact same thing to Facebook, Microsoft, and any number of ISPs (remember back when someone at AT&T went public about the NSA server room built into their building back about 10 years ago?). No one (except in some cases apparently Microsoft) is actively helping the NSA do this, and the NSA doesn't have special access into those companies' databases. They're quite literally parking their servers right outside Google's facilities and listening to the traffic. There's nothing anyone can do about that. They could park their servers anywhere on the internet, but they've chosen to put them closest to the companies with the most user information flowing in and out of them. None of that is Google's doing.
"Added with the fact that if for any reason Google fails, then smartphones won't function properly minus basic functions, which many see as irrelevant due to the Internet."
If Google goes down you'll lose all your Google services, but that's it. Operating system upgrades only come from Google if you bought your phone directly from them, otherwise they come the device maker and your carrier. Amazon Kindles run Android entirely without connecting to Google's servers.
"Compare it with a non-smartphone; a Nokia 2730c would still have its snazzy features as long as your manufacturer and operator are still there."
That phone runs Nokia's Series 40 operating system. You're literally advocating that people ditch the most independent mobile operating system on the market for something that is the complete opposite.
"Smartphones need the extra corporation to be involved."
Android is maintained by the Android Open Source Project. Google has a vested interest in the platform because they sell their services through it. Android is linux-based and their current development roadmap has the Android kernel merging back into the Linux kernel. People can and quite frequently do download the source code, customize it, and flash their customized versions of the Android operating system onto their phones.