Howdy, Tom
You write:
You know, heat is one way to fractionate the so called "major components" because it bursts the cell membranes.
The new policy allowing any fraction of a "major component" is not too far removed from saying, "It's OK to eat blood, you just have to cook it first."
You are correct about the heat. But fractionating red cell membranes is as easy as exposing red cells to tap water. It is easily observable under a microscope.
White cells are another story. Though exposure to tap water affects the white cells and fractionates most of them, these cells are somewhat resilient to tap water so that exposure does not ensure fractionation of all of them.
But, if person exposed white cells to water and then heated it to a boiling point, within seconds there is no distinguishable component of blood to observe. For purposes of acting as blood, the substance is ruined. The same is true of platelets.
So, according to WTS guidelines, were a JW to cook blood by adding a little water and then bringing it to boil, they can eat the stuff because the four components of plasma, white cells, red cells and platelets have been completely and irrevocably fractionated, and fractionation is the determining factor the WTS' policy of what to forbid or respect regarding using from blood.
An amazing policy, isn't it!
Marvin Shilmer