True, but if you happen to already have a serviceable body that you like laying around, I don't see any good reason not to do it. I wouldn't go out of my way to buy a body, though, since building one is only a little more work.
I've had a frustrating time with this guitar. I botched the nut slotting, which really sucked because I had a lot of time invested in making the nut. Now the string spacing is off, and it's hard to tune because the strings are binding in the nut. Also, I had a lot of trouble getting the neck relief right. I've got that settled now, but I had to tweak on the truss rod more than I wanted. Finally, I hated the pickups when I first plugged it in. I had always heard EMGs are loud and powerful, but I found the bridge pickup (81) to be weak and tinny. I think I should adjust the pickup closer to the strings, but I need to find some longer height adjustment screws first. I stripped of the heads off the cheap pot-metal screws that EMG supplies, and had to replace them with shorter ones from the hardware store.
Anyway, a friend of mine came over in the midst of all this to play some music. That really changed my feelings about this guitar. With a modern crunch dialed in, and my friend accompanying on bass, it just sounded "right." Sat perfectly in the mix, and overall my playing sounded better than I'm used to. Even with the messed up string spacing, I adjusted to the seven pretty quickly, and I was loving the possibilities. I still don't like the sound of it solo, but if there's one thing I've learned from bass playing it's that your ideal "solo sound" usually doesn't work in a band. So I'm pretty happy that it sounded good in a mix. I've got a Floyd nut on order which should hold me over until I can build and properly slot a new nut, and I'm thinking that some playing with the pickup heights can give the guitar some more punch.
So it's not quite done yet... but getting there.