"most people don't have gut microbes that can handle the fiber or produce necessary quantities of phytases to break it down". Doesn't this suggest that "some"

"most people don't have gut microbes that can handle the fiber or produce necessary quantities of phytases to break it down". Doesn't this suggest that "some" people do have such microbes? Otherwise the word "most" should have been omitted. Maybe that is where my confusion arises from.