Is Silhouette Soft a safe procedure? What should I expect? (Photo)

I am 63 years old, had Botox for a number of years and had Hifu and number of years ago my eyes became sunken in to my head and I lost facial fat and nerve damage to my jaw area, it aged me terribly, now it’s a case of chasing my ageing face with fillers, prophilo, Mesotherapy , now I want to try threads and my doctor has said silhouette soft is a better option Dr Rajani said he doesn’t use the for a number of reasons but didn’t say why. Can you give me any thought on this please. Thank you.