Can finasteride grow hair on a bald scalp?

Drugs like finasteride and dutasteride, usually reverse miniaturized hairs, and not grow hair in a completely bald man; however, some men have very fine miniaturized hairs that they didn’t know existed on their bald head, so I have seen some cases where these men, who thought they were bald, grew hair on finasteride. The photo below shows a 43 y/o male who may reflect what I discussed above.  I wish I could have examined him before he went on dutasteride.