You can do exactly that "run a fused wire from battery to switch to light to ground" and that is the way to do it just to stay away from any other OEM electrics. You will be just fine with the set-up you described...as NIKE says
If your lights came with a switch, just finding a place to mount it would be the only hurdle you'll have! Some people don't like cutting holes in the dash, some find really cool spots for them.
The other reason
why people purchase after market switch consoles, power distribution units and alike is for the following:
What happens is later on when you start adding more electrical accessories..things just start to grow, (it's a really weird Jeep kinda thing) your battery will start to look like it was just dragged through a "seaweed" patch and you will start to accumulate large amounts of wires coming into your cab.
Like I said, you'll be fine on your set-up! Send me an e-mail if you need anything like tips on running wires, fuses, relays and if you need any wire wrap or connectors, I will give them to you free.
OK, I read the threads and understand that using a relay in the CANBUS wiring causes spikes from field collapse and I should put diodes, capacitors, mosfets, and flux capacitors all over the relay coils. I truly appreciate the expertise available that you technically competent folks bring. Thing is, I don't know a coil from a colon.
But I want to ask: if I have a 10 amp rated light, or any amp lights, and the switches and wire guage can handle it, why can't I just run a fused wire from battery to switch to light to ground? No canbus, no relay, etc. I know this is not technically elegant, but what is the harm to the Jeep? I don't want to use any existing vehicle switches, wiring, etc.
What if I add a few of these on separate circuits? I am not challenging your expertise, but it seems like every solution needs another solution, and a PhD in electrical engineering to slap on some lights. One light I bought comes with a cig plug to run it. It has no diodes, I just want to hard-wire it. How stupid am I? Really?