Just because it doesn't cure everything doesn't make it useless, bodybuilders do it as well to control blood pressure. Kinda like how those bubonic plague masks don't make covid masks useless.
When some absurd cure comes along, and you question it's veracity, the common and often immediate (even vitriolic) response is to find some extreme edge case where the cure is effective.
This approach demonizes the questioner while justifies the cure for any and all ailments. Therefore shutting down any rational discussion on the merits of both the cure, underlying disease/problem and any concepts of prevention.
Agreed. My doctor actually had me do this last year due to high ferritin/iron levels. I did a double red blood cell procedure and the fatigue issues I had went away.
To be honest, I've been given similar advice for high levels of iron once from a doctor. Let go of a few gallons over a year and my iron has never been that high before.
It's either that or pumping for breast milk. Since we have no idea what gender "superkuh" is, the latter may not be an option, despite their username...
There are a collection of things which are difficult for your body to eliminate, regularly extracting blood is a mechanism for getting rid of some of them.