Is there any truth into the scalp tension/blood flow and hair loss theory?

I am familiar with the widely accepted DHT/androgens theory of hair loss, but recently started to do some research about the other theory of scalp tension and blood flow, which is most of the time considered as pseudoscience.

What do you thing /sci/

>why hairloss only happens in the area over the galea aponeurotica, and does not happen in the more relaxed muscles around it?
>why scalp tension overlaps with the Norwood scale, areas with the highest tension seems to go bald first
>why bottox injection in the scalp actually reduce hair loss.
>why bald people tend to have generally higher scalp tension than non bald people
>also testosterone tends to be converted to another hormone in high oxygen environments.

Maybe DHT is just a part of the puzzle, and we don't really have to nuke DHT levels in our entire body to stop hairloss.