Massage scalp -> promote blood flow -> reduces DHT conversion?

Is this theory correct?

1- Massage the scalp to promote blood flow
2- The blood flow reduces the creation of DHT



videos that speak to this idea:

rubber scalp massager   <-- good
https://www.youtube.com/watch?v=dJ2ZRGA4mqQ

if good blood flow, T doesnt convert to DHT
https://www.youtube.com/watch?v=JKBZLoRHHx4



Others if you have time to watch:
How to Make Hair Grow in Bald Spots
https://www.youtube.com/watch?v=S2RnGBmQ_fU

Ayurvedic Scalp Massage (most results feature women)
https://www.youtube.com/watch?v=OaNt4zg7jVA
https://www.youtube.com/watch?v=C9LpfBEkF7s

I don't buy this theory. I believe in the calcification theory and that blood flow simply creates a stronger environment for hair to flourish because of more nutrients and less hardening of the scalp. Blood flow shouldn't prevent a hormone from being produced... I'd need to see some research papers on that.

The aromatase enzyme does not work well in low oxygen environments. Therefore dht production in these areas is more prominent. I saw the paper at one point but I don't remember where.

Massage is very good for overall health of hair and scalp, but I don't agree with theory.