It's human nature to fear & reject change.
If anyone thinks drilling down through menu's to find options is still acceptable in 2014 then they need their head looked at. The ribbon organises everything logically and has existed for over 7 years now in Office Suites (since Office 2007). If people can't adapt to something infinitely better by now then that's their problem.
Change is not inherently good. Tell the people who work for several soon-to-close Australian car manufacturing plants that they're just rejecting change out of fear.
It's not unreasonable to reject change that obfuscates or reduces functionality. Look at Windows 8. Look at the Nadia Comăneci-grade backflipping that Microsoft have done since its release. And that is not all "fear". There is a very large dose of poor UI design in there, given it does not properly cater to the still ever present mouse/keyboard input. It's clumsy, awkward and hides functionality that was previously readily available. I have Windows-centric co-workers (high-level IT guys) who scramble for the latest and greatest. Many of them refused to install Windows 8.0 and insist it has only
just become usable with 8.1. So, apparently their criticisms are unfounded, Windows 8.0 was perfectly usable by everyone, no complaints about Windows 8.0 were valid, and they were all just afraid of change?
In the case of the ribbon, that UI element consists entirely of the vertical menu options being smeared horizontally across the screen, with clear, horizontally aligned words replaced by icons and buttons of varying and mixed sizes, some with labels next to them, some with labels underneath, some not labeled at all, some of which result in further unclear icons (e.g.: Paste results in three more Paste icons). What does a bucket icon mean in a word processor? Especially when the Ribbon "adapts" to the screen size, eliminating labeling and re-ordering/re-locating functions to often significantly different locations. Seriously. Resize your Word 2013 window some time, in small increments, and watch all the bits resize, lose clarity, shift around and even vanish. The user has to pay way more attention, look much more closely, and think a lot more about what they're wanting to do. Menus? You aim for the top, and on a small screen you might just have to scroll. But it's all where it always is.

Mighty Morphin' Ribbon.

Apparently none of those three Paste icons means "Paste Special", which does not get its own icon.
It's the digital equivalent of getting your toolbox from the garage and laying out every single tool on the kitchen floor, even though you only need two screwdrivers. Having
every single thing right to hand might convey power, but it does not convey ease of use or simplicity.
Perhaps you'd prefer commands organized in a spinning wheel, like a roulette wheel? Menus are everywhere else in every other OS, including OS X for a reason. Because they work. Because they're clear, and because they're easy to aim for. And because the rest of the program uses them too. Right-click in the middle of your Word document and tell me that menus do not pop down and out.
But, sure. It's just fear.