Carter BBD confusion

I had the holley 2280 2 barrel on my 318. Started leaking around the throttle shafts. i decided to replace it with the carter bbd low top.

Funny thing i noticed about this carburetor is that the fuel pump diaphragm has a spring on the top and the bottom. so when i got the carburetor the throttle blades are always open. Upon installation i will have the throttle return spring on there and it will pull the throttle closed. if the spring ever happened to break or come off , the throttle would open to full throttle and make the car suddenly accelerate. I just dont like the idea of this.

so why was is designed this way and can i take the top spring (that is pushing the diaphragm down) out of there so the throttle blades are closed when the throttle return spring is off. google images will show pics of this carb in the wide open position. ive never seen a card do this....they always came out of the box with the throttle blades closed