I Had Fat Injected into my Lower Face and I LOVE IT. Why Doesn't Everyone Do It?

I always have botox in between my eyebrows and above my brows. I was going to do a filler in my lower face to have more youthful look. I asked my long time Dr. what could be done. She never mentioned transferring fat. After my full TT and breast lift consult I asked the same question. It was decided to I would do it. The results are incredible. I love it! I think I was lucky to have this procedure done by someone with a lot of experience! So why don't more people have it done?