Asked to get fractional resurfacing carbon dioxide laser treatment before rhinoplasty. Is this usual and necessary?

Hi I am a 41 year old male, living in the UK, from an Indian backgroud. I have always disliked my nose, which has a bump and the tip is bulbous. Recently I got in touch with a very well known doctor and he said my nose was currently unoperable as the skin was too thick and that I needed to get 3 sessions of fractional resurfacing carbon dioxide laser treatment (each session 3 weeks apart) and then he would re-assess. He said I can get the treatment with anyone. Is this usual and necessary?