Why some doctors don't recommend Irradiated Rib Cartilage in Rhinoplasty and Asian Rhinoplasty?

In most patients, rib is not needed for your rhinoplasty. Ear cartilage and septum is almost always sufficient. Your own rib is preferable to irradiated rib if you are cartilage deficient. Irradiated rib is sometimes necessary to use if the patient's own ribs are calcified (typically older patients). 

The main downside with irradiated rib cartilage is the fact that it is dead tissue and not living, viable cartilage as from your own rib.  This means that it will not become a living part of your nose, but rather will be placed by fibrotic tissue that will eventually resorb.  For permanent results, your own cartilage (autologous grafts) is superior to any homologous grafts.  I perform rib cartilage harvest through a 2 cm incision, which will heal as a thin line which will become unnoticeable in the vast majority of patients.  

Asian rhinoplasty and use of patients own cartilage vs. rib? For 35 years i have used the patients own septal and ear cartilage without a keloid and what I feel is less risky than using any type of rib.