Stereo Combined Panner (Cubase Pro only)

Why is this a Pro feature?

I can understand, pro having more effects, instruments, VCA, audio warp, control room, vari-audio, surround and most of the other pro features, but combined panning? Seriously why?

I’m using Pro, the guitarist in my band uses Artist. It means we have to use a free combined panner plugin in our limited 8 slots.