Sage is a Greek doctor using the humoral theory

[Hazama999]

I mean, modern doctors today aren't using old philosophies that SGE is, nor do they use aetherology or sorcery, so you can't take it as a 1 to 1 comparison. You gotta supplement stuff from lore for it to click.

Oh yeah not saying we do. It's just that the analogy had me tilting my head. An infusion of blood is the last thing I would associate with a barrier, since it is more of a reactive measure... But yes, as you said, not 1 to 1, so I'm not gonna nitpick any further.