See stuff like this, in addition to stuff about forcing protein through tubes damaging the protein structure and subsequently making it less digestible - is stuff I don't understand.
I work with proteins every day as a lab technician and I've studied them a bit w/ a BA in cellular and molecular biology, however I haven't fully applied my background to the science of protein metabolism.
I understand that pressure, heat, vigorous mixing, and enzymes can all denature protein to varying degrees. What I don't understand is how denaturing effects how they are digested and how even shearing of amino acids can effect absorption because ultimately the body takes amino acids and forms glutamate which is used to create energy and urea. Whats left of the amino acid is further broken into intermediates used to facilitate the other energy producing cycles in cellular metabolism. Besides, I eat cooked meat all the time - isn't that similar to drinking pasteurized milk?
Now I suppose that raw milk contains growth factors and metabolic signals that stay chemically active and provide some sort of use besides direct conversion into fuel. How that stuff stays bioactive in your gut is beyond me, but I'd love to see a simple writeup with some science behind it. I'm not even skeptical, if raw milk was readily available for me I would just as soon drink it - I've looked around though and sadly, it isn't.
The way I see it, you can't really win no matter what you eat - there always seems to be some parameter that is below optimal "oh you gotta stir your protein with a spoon and stand on your head when you drink it cus blah blah blah blah"... I wake up and get out of the door in 20 minutes because I don't have all morning to jack around... I gotta sleep to let the proteins work and work to buy the proteins in the first place.
It's fun to learn about new things and optimize your diet and daily routine but sometimes you gotta go with the hand you are dealt and hope that somehow someway you can still progress.