I'm new to knives, but what so great about the Kukris?
When you've talking about kukris, you have to remember:
They're for chopping.
In this capacity, the shape of the blade is what does the work: the concave shape (as viewed from the "wide side") makes sure the blade stays centered on whatever it hits. There is also some physics that happens at the moment of contact that makes a kukri easier to cut with, but it's complicated.
Kukris made in the tradition of the originals are also much thicker, with quarter inch spines on average, although bigger ones exist. They have about twice the weight of some of the "modern" kukris. Some "modern kukris" are more like kukri-shaped machetes.
The kukri's shape also concentrates a lot of that weight toward the point, further improving their chopping power.
As phenomenal as they are at hacking through wood and brush, kukris are not intended as precision tools. If you're doing food prep or fire making, the big blade is not your best option. It can do it, but that's mainly what the two small items are for. A traditional kukri comes with a Karda and a Chakmak. The Karda is sharpened for your precision cutting needs, and the Chakmak is not sharp, and serves a variety of functions, including as a sharpening steel for touching up the edges of the other two tools. It can also be used on a fire steel, and just about anything else you can think of.