I'm sure you're correct. That said, I saw a friend who went bald at 28 get all of his hair back from Minoxidil + finasteride. Maybe his folicles weren't closed/gone but he was bald and a year later, was not.
Apparently there's also now-a-days, Micro-needling, Stem Cell Therapy, Platelet-Rich Plasma, and others. No idea how effective they actually are
Sorry my bad. It's called that way in where I'm from. The hair loss is mostly due to mechanism similar to pattern baldness but the hair loss can occur even without death of hair follicles. It could also be triggered by some autoimmune disease.
This isn’t the whole story. Many people have follicles that are dormant. Many people have success regrowing hair on bald spots with minoxidil and/or finasteride.
If you look like Sir Patrick Stewart, yeah, that’s not growing back. A bald spot might fill in with medical treatment though.