Except this isn’t “biology being real”. It’s non empirical. If you abide by the theory of evolution (which I assume you do), then you should be against teleology in biology, since there is no such thing, concretely, as a “body that’s supposed to do things”. It’s just layman speech to inform those that aren’t that far in biology, or a short version of “this is one of the possible things that a being (or its system) does in order to survive/reproduce”, not that it is necessary. To imply that it’s necessary would be to imply that nature has a will, or that there is some sort of supernatural will Teleology in biology