Interesting thoughts indeed! I was not actually aware of this, so something else i want to go off and look into. But i do agree, what may produce a negative score in one person may not work the same way on another person. If i am feeling ok ish the normal meditation approach works for me, and in that moment in time metal music would not be helpful. But often when i am in moments of despair the calm music actually produces a negative response in me and just really grinds on me, and this is where i can process it using metal music, which a lot of the time is not singing about angry or evil things as people think. There is plenty of that, but some metal bands are singing about some really mind opening things. If you can bare it, as it may not be your cup of tea, or even just scan through some lyrics, the band Nevermore- wow, he writes about some super deep mind expanding stuff. He sings , not a screamer so easier on the ears.

Went off on a tangent there, but yea i think what you are saying applies to everything. We as humans invent ways to measure and scale things, but that is swayed by the person who invented that method too, just look at the double slit experiment as the foundation for how we measure and look at everything, it makes you question things.

I think it's the same with 'diet's, veganism has such a huge movement behind it, as does the ketogenic diet, the Mediterranean diet, even a strict carnivore diet, all of these can produce similar health benefits and each camp argue against one another, where as i think it mostly depends on how that diet fits with the individuals consciousness level at the time and whole plethora of other internal and external factors. Having been a vegetarian for 5 years now, trying a strictly carnivore diet would cause carnage on my body most likely because of the mental stressors for me personally this would induce.

Ive been all the way over to vegan too but for various reasons found it more stressful and decided that the proposed health benefits of it will most likely be detrimentally affected by the mental stress this was causing, added financial pressure- no matter what anyone says it's not cheap, cooking separate meals, eating shit food when we dine out, constantly denying my self things i greatly enjoy, ending up starving half the time because my work schedule just did not allow for food prep and you cant just go and grab any vegan food at hand, at least where i live, so i would just end up not eating at all.

So i've gone back to vegetarian and i am much more comfortable with that. Oh but dairy is bad for you etc etc, yes but so is stress, lack of social interaction, and working a 15 hour day on an empty stomach. So eh!

It all comes down to the individual is what ive settled on at the moment no matter what you are looking at or measuring.

P.S I was over the moon to see you had re-steemed my blog on your page. Thank you so much for doing that :D