This is me. Perhaps my role in this discussion is not one of expert but rather one with a harrowing personal experience, so my bias may be at work.
I researched "bloodless medicine" a bit. As far as I can tell, this was mostly invented by jws. I do not say this as a person offering credit for something good, but perhaps blame instead.
Yes, there have been advances to prevent more deaths in battle, and after AIDS came to light, more research was done about reducing the use of blood products. Those were the good advances.
The rest of this woo called "bloodless medicine" largely seems to be techniques not proven effective and safe, yet touted by such disingenuous front groups such as NoBlood.org. They have "expert" shills claiming they have no connection to jws and are genuinely so supportive of these non-evidence-based techniques that they spend their free time promoting them.
I see these front groups as not different from Narconon, the Scientology group blamed for deaths while preying upon vulnerable people to convert them to a cult.
Anyways, whenever I tried to identify non-jws supporting "bloodless medicine" I came up empty. FWIW.