because their real job is to preserve the knowledge, not innovate or invent new stuff. but if academia is not the institution in charge of innovating, then whi

because their real job is to preserve the knowledge, not innovate or invent new stuff. but if academia is not the institution in charge of innovating, then which is it? I'm still a bit confused about this. I saw it like a contradiction but do not know what to do about it. PhD degree programs telling "come innovate" into the institutions whose real job is to preserve knowledge?