If you consider your hair follicles as individual plants rooted in the skin extracting minerals and vitamins from it, then you are off to a great start in understanding growth strategies. However, there is a detail that I need to share here. Yes, the follicles dermal papilla is rooted in the scalp "soil" aka the hypodermis area extracting growth hormones and resources. However, that bed or flow layer can be miniscule like a stream or huge like a river.
My point is, in male patter balding, the hypodermis area is squashed and flattened from fibrosis, calcification and the sub cat- fat loss from DHT. This creates an under skin stream barely flowing enough to feed the follicles. In order to fix it, the aforementioned issues with that layer will need to be rectified and reversed. You want a free flowing underground "skin" river with waves of nutrients, minerals, growth hormones covering the little root straws of your follicles. The bigger the oasis, the more hair growth or regrowth.