That's what it's supposed to do. Just don't overfill the priming pan.
The metal fuel tube needs to be heated in order to vaporize the fuel for normal stove operation. To this end, you prime it by allowing for a small amount of fuel to enter the priming dish, light the dish, warm the fuel feed tube, let the fire extinguish, then open the fuel valve an hopefully hear vapor movement and light it for normal operation. The soot that accumulates during the incomplete combustion during priming is just a bonus feature. Setting fire to everything around you in the priming process? Super bonus mega unlock.
You can see my hanging Whisperlite rig hanging from the straps of my portaledge in the first photo. Even if you manage to avoid death by flame, you still have a big pot of boiling water precariously suspended above your lap.
It's a good thing nylon is flame proof. Oh. Wait.
As problematic as they are in comparison to isobutane canister stoves, Whisperlite-type stoves are the most efficient thing going for long periods in cold weather, especially if melting snow for water.