So, in conclusion, I disagree that adding wrappers for these would be nice. It wouldn't. It would cause some people to think they would be useful things to call, and they would always be wrong.
We are all consenting adults. If people want to shoot themselves in their feet, we let them. For example, we have os.open, even though there is no garbage collection for file handles, and we have os._exit, even though it doesn't call finalizers.
People should trust that the APIs we expose go literally into the library, so we can blame any consequences that this has onto the library (and possibly the kernel, in turn). People readily accept that explanation.