I'm not taking sides.
I have no qualms about using modern medicine, from vaccines to chemo and radio therapy, but.........a poultice is a physical thing; it's actually something that eases certain conditions. It augments and accelerates healing, it encourages 'good' healing by helping to rid the body of what is effectively toxic waste or by focusing heat on a site that needs it.
In someways they seem to stimulate and encourage the body to heal itself, reducing inflammation and limiting further damage
Modern techniques, such as heat pads, heat gels and the like are pretty poor copies of their actions tbh.
Mag sulf paste draws splinters and pus from a finger much more effectively than a dose of antibiotics.......that's epsom salts
As for surgery sites......so long as it is healing well, and the wound has closed, something that helps reduce scar tissue by encouraging speedy healing, something that genuinely feels comfortable, that soothes..........that's not witchdoctory, that practical
My tuppence halfpenny worth
Oh, and as a bushcraft forum, most folks are interested in what's out there in our natural world that's useful for all sorts of reasons.
Health interests us all.
cheers,
Toddy