Why use lasers instead of cautery for small facial broken capillaries?

I know cautery is an outdated way to treat small facial broken capillaries and now lasers are recommended . This makes no sense--cautery is cheaper, less painful, and most of all does not leave any nasty bruises, like laser treatment does. The bruising from both vbeam and pulse-dyed laser treatment is so terrible, I cannot understand why cautery is not offered. Laser seems much more traumatic to the skin, and requires more sessions, whereas cautery has always worked for me after one session.