and i think this is the whole point of it. These companies (Facebook, Apple, WhatsApp, Google, etc), all want you to use their dumbed down, one-size-fits-all product. There are no options to customize anything. Everything else is not available to the user, or is hidden. Firefox is also jumping in on this idea that people don't want any buttons, and that you should just remove everything from the UI. Now you can't even turn off JS from the GUI without a plugin (sorry, an add-on).
So, facebook comes in boring blue. All images are the same size. all text is the same color. You get out of your 9-to-5 work at a cubicle and go into your facebook cubicle.
But the thing is: a lot of people want to customize things. Guys just loooove slick blue-on-black. Girls love iOS omg white with cute handwritten font. But no. These companies don't let you take that decision. It's not up to you. Do people suck at "theming" their computers? GOD YES, "menu bar" background images are just horrible. but some people like it. Even if it's horrible, it looks good to them, and guess what? Just let it be. Let the user be able to skin their stuff. Why go all soviet on them?
So people find ways to do this with "alternative" apps that do more harm than good (like those facebook "plugins" that let you add emoticons and shit - guess what! Facebook had to incorporate that. )
And yes. I remember MySpace. I remember what a pain it was. how truly AWFUL those profiles looked like. Completely unreadable, just garbage. But that's how the owner of the profile liked it. So, let it be. What's next? Municipalities telling people what color they should paint their house? (oh yes, that already exists in some "communities" in the US)