I had far less extensive and 'shallower' hair loss/miniaturisation and had just over 2k grafts solely in and just behind the hairline. I think yours looks as if it's moving towards the midscalp, along with temple recession. The closing of the proposed transplanted area looks pretty high on the lateral hump in your first pic, too? I used to go to the gym with a guy who'd had a (poor quality, old school plug) transplant and the top was completely disconnected from the sides.
others are likely to know more/may disagree, but wouldn't be surprised if this required circa 3k grafts to achieve desired density.