Humans are not wood, though wood and humans are both matter. Humans are however "made of meat", just as any other animal is.
As far as I can tell, the point of describing humans as meat is not to make an assessment of worth, but rather to drive home the fragile and temporary nature of humans. I don't know why anyone would object to that.
Fair enough. I suspect the terminology "meat" is mostly a homage to Terry Bisson's short story "They're Made Out of Meat". That is why I like the word anyway. ;)
As far as I can tell, the point of describing humans as meat is not to make an assessment of worth, but rather to drive home the fragile and temporary nature of humans. I don't know why anyone would object to that.