When I've worked on large commercial shoots or small features there is an obvious 32 year old white guy demographic. There are few 50-60 yo crew members but they were often the dads of the 32 year old guys...Women were more on the producer / client side, HMUA, wardrobe or script spv. Some directors too. Yes, there were a few women working in the camera department, many more in LA than in Detroit where I came from. The same is true on high end commercial adv photoshoots. Very, very few people of color.
A lot of crews are tight networks and generational things - sort of like big city fire departments. Just one semi outsiders opinion.
I was in a similar boat, but I still do mostly still works with about 20% video...b-roll, interview, short docs. So I opted for the A7s. However I have rented the c100 a few times and I lust after one of my own (I own 12 Canon mount lenses from 14mm to 300mm) luckily there will be plenty of c100 for sale as many folks buy the c100 mk2.
C100 is easier, more ready to go, A7s is still a still camera that does great video, not a video camera.
Flip a coin?
It funny that people are still using the 2 year old crash in NYC that "almost" hit someone and "could have" caused damage. Y'all need to wait for something serious to happen. Who has more pull with the MPPA lobbying the FAA. A bunch of low budget guys (like me) flying go pros or the guys who have millions wrapped up in helicopter companies flying REDs or Arris?