Why Camzyos instead of surgery?

I am just curious - once HOCM is diagnosed, why is Camzyos recommended instead of other treatments - like myectomy? (is that what once treated this? or ablation?). I am a complete novice here with a recent diagnosis - and mainly intermittent breathlessness. I have my first appointment at a COE on Friday. My local cardiologist said that I am a candidate for Camzyos and given the expense, I am curious about this. Also, can anyone tell me how they handle the expense? After help from a person's supplemental plan (if any) and from Bristol Myers, if approved, what do people end up paying for Camzyos?