the are 4 step of recession of TP.
In grade 3 and 4, it is mandatory to rebuild TP or you will get a toupee effect.
That said, if I well understand his thought, I partially agree with gastby.
Rebuilding lateral hairline is crucial to lower the frontal hairline.
But you can rebuild the lateral HL and not rubuild the temporal peaks.
Couto (maybe the best surgeon along with Keser in Europe to rebuild temporal peaks) has a lot of cases like this.
If your concerne is grafts sparring, don't worry, temporal points don't require many graft.
The first cm is about 15 FU/CM
The second is about 25%.
So, 100-150 grafts per side can work the trick.
My concerne is the end result.
If a person doesn't have a Great Recession of TP, I suggest not to do.
I love natural temporal points.
Saw very few cases of nice temporal points from an HT.