Is this really necessary for hiking, or backpacking? I have not done very much, but maybe should give the Aurora a try.
No it is not necessary. You can easily go through life never knowing what your awesome Barkie is capable of. A lot of people do in fact prefer to use a hatchet or an axe which is by all means a more efficient tool to prep large amounts of firewood, particularly when you are generating more than a nights supply of it or are trying to survive in a cold environment by fire without benefit of adequate clothing and/or shelter.
On the other hand, if you only need a small fire for cooking, a little warmth and enjoyment than you can easily provision the amount of wood required by batoning or perhaps simply collecting smaller sticks and available wood. If you are hiking and backpacking and carrying your shelter, adequate sleeping bag and clothing then you might fall in this category. Certainly, eliminating an axe from your gear will immediately shave a couple of pounds of weight. You can do this and still enjoy having a fire with just your knife even if the small sticks aren't available.
From the perspective of survival skills, then I recommend that you learn the skill. It doesn't take a huge amount of effort and you will gain the confidence to go off and venture into the woods without a hatchet. You will have the skill to find dry wood under wet and rainy conditions, axe-less, with just your knife by splitting the interior of larger sticks and small logs ripping them down into dry kindling. Also as Talfuchre mentioned above, there are other bushcraft skills like trap making and constructing a fireboard for the bow drill where batoning wood as part of the shaping process comes in handy. These are good skills to have. Also, batoning is kind of fun to do. Mind you, I agree with Pitdog, it would be a PITA to do all day long. However, prepping a small fire by splitting a few rounds with your knife is kind of enjoyable. Makes you appreciate having a solid knife like the Aurora. In terms of survival - well it is the skills that count more so then whether you need to access those skills or not. If you never need to rely on batoning to shape or split wood then was it a waste of time to learn? You will only be able to answer that question on your death bed. I can tell you that I have used the skill and will now often not take an axe where I previously would have. For me it is worth it.
Regarding your knife. At 0.170" thick, super tough A2-steel construction and with its full convex grind, the Aurora will have absolutely no trouble batoning most types of wood. Just remember to always use another piece of wood to baton your knife not a metal tool like a hammer. If you hit a knot in the wood, take care working your way through it or extract your knife and baton from the opposite end. As you practice the skill of batoning, you will get a feel for how much strain you are putting on your knife via batonning, what the wood feels like when it wants to split vs what us really resistant wood.
I don't see any minus related to learning valuable survival skills and techniques to make do with your only your belt knife in terms of building shelter, fire and food provisioning. You will only develop these skills and develop an inherent comfort and trust in what your knife is capable of doing by practicing in a controlled and relatively safe environment. Don't learn to baton under a survival situation and in duress. Do it in your backyard. Your Aurora was designed and marketed with bushcraft chores so I say use it without fear!