It's hard to say unless you try.
Before I started my treatment I had a chat with a friend who is 39yo and NW5-6 bald. He shaves and it's hard to tell how much hair he has. I've known him for 10 years now, and when I first met him he was already NW3-4.
Anyway, I was telling him that I want to start a treatment because I remember he did a bit of a research about 8-9 years ago. He told me that he had a few sessions in a hair clinic and they injected some sort of DHT blocker into his scalp. He couldn't remember exactly what the treatment was but apparently he had to keep going there, but he quit the treatment just after 2 sessions. There was a bit of a regret in his voice, but he's happy with his life these days.
I'm telling you about my friend, because he was in a similar situation to yours. He wasn't sure what to do, didn't follow the treatment and he sounds slightly regretful that he quit. However, he's got other things in life going for him, and he doesn't miss his hair.
So, you can either come to terms with your loss, or do something about it. The choice is yours.
A treatment is not guaranteed to work, but if you try you might get the satisfaction of trying. If you don't try, you might keep wondering and asking yourself the "what if" question like my friend.