Look forward to seeing results, maybe you managed to actually fight against the inflammation and fibrosis topically very interesting.
I'm 100 convinced on muscle tension is ultimately causing this inflammation. Genetics will play a very small role like they do with everything. Also skull shape (also caused by muscle tension / posture from young age as skull develops) but not a lot can be done with these other than meds for bad genetics which I refuse to entertain (but agree they can help).
When people talk about posture they look externally which does have some tell tale signs but the deep tension which is actually causing the galea to tighten and inflamed are deep inside shoulder muscles and occupatalis etc is very hard to see from outside. But show me some pics of bald v non bald people and I can almost always see a difference with both alignment and shoulder tension.
People also say women have bad posture etc but thier overall muscle mass and interior tension is minimal although so doesn't affect galea as much, when you do see a women with receeded hairline usually neck is also out of alignment compared to most women, it all adds up.
It's so hard to change posture habits and people grow into a posture over many years I am currently focussing all my efforts in reducing upper traps tension which imo is the main culprit which starts the chain reaction by pulling down SCM / levator scapulae and then sub occipitalis ~ occupilatis.
There is no doubt the occipitalis directly connects to galea and pulls it back, so doing all I can to reduce this tension.