Restoring the temple peaks compared to the hairline (photo)

Is there a reason that a majority of hair transplant before and afters the guys dont have perfect hairlines (like the picture)?Like, I want to try and get a perfect hairline.. is there something preventing that? Also, can hair be transplanted as low as you want or will it not grow in certain spots?

These are decisions that a patient must make when planning the hair transplant with a good surgeon. Losing the temple peaks does not conform to normal genetic hair loss on the front, top and crown of the head, so this man was bothered by the loss of his temple peaks. The low hairline, on the other hand, can be a problem if he develops hairline recession. The leading edge of his temple peaks is too straight, in my opinion (my artistic view) as you can draw a line connecting all of the hairs (it should be ragged).