The first party camera is designed to be operated by every human being on the planet. Redesigning it to accommodate highend workflows makes as much sense as redesigning a $50,000 cinema camera to accommodate parents who want to record their kid's soccer game.
I believe it could be designed in a way to accommodate both user groups. I don't mind another app but they've always been paid (while writing this I checked and turns out Blackmagic camera is free, awesome!)
Most software/hardware goes for one group, as otherwise you'll need to make sacrifices to equalize the experience. It's just not feasible to build something that works as well for average joe as for a professional user, they use their tools differently.
I was honestly curious about that myself, I have generally just used the stock one but I am now curious if that one works better or has some better features.
One of the big advantages to the Blackmagic Camera app is that you can shoot Apple Log into an H.265 container rather than ProRes, saving huge amounts of storage space.
It also has far better features for exposure, focus peaking, etc. It's the same UI which is in Blackmagic's actual cameras.
