Laser is designated as "hair reduction" technology. For some people, it does remove hair. For others, it doesn't. And there are a lot of variables in there. The biggest ones, as others have mentioned, are having optimum skin and hair tones (light skin, dark hair), but there are other factors as well.
Additionally, while certain blood tests used by endocrinologists may indicate you have "low testosterone" there can still be enough free testosterone floating around to drive formation of DHT, Dihydrotestosterone, which is a testosterone derivative that causes male pattern baldness and also drives the formation and growth of facial and body hair.
As Ms. Grace notes, the only FDA certified method of "hair removal" is electro. But it takes longer, and is more painful.
Honestly, were I in your situation, I'd continue monitoring progress, but if I began to see very little change after the 8th or 9th session, I'd just stop and switch to electrology. It sounds like yours is having an impact so maybe all you really need is to be patient.