Based on your pre-op photos, transplanting the outer edges to compensate for future hair loss was the right approach. I would agree with your last statement if the initial plan were to restore your hairline. Then you would need grafts in the mid-scalp to ensure there would be no visible disconnect between the hairline and the mid-scalp as your hair loss progresses. In this case, the goal was to restore your crown, which was your main problem area. The clinic must ensure you don't have a donut hole in the future. This is when there is an island of hair with lateral and lower edges of the crown thinned out.
Here are examples:
In my opinion, all clinics must reinforce susceptible areas to ensure there isn't a disconnect in the future. Now, I have asked them to address some of your other concerns. But I think the placement is actually spot on. There are a lot of cases here where clinics have missed thinning areas, and it does present a problem. Now, if you decide to restore the hairline, they will most certainly need to transplant the mid-scalp.
Now, you might think, 'well, what if my hairline and mid-scalp start to thin? Then I'll only have my crown.' I would say that is why one-and-done hair transplants don't happen. Once you address the front, you'll eventually have to address the back and vice versa. Hopefully, you're on medication that would give you plenty of time before you eventually have to restore the front and mid-scalp.