There are distinct advantages with oversampling an entire chain of plugins.
you don’t have to run your daw at a high sample rate to take advantage of higher sample processing.
each plugin doesnt need to handle its own oversampling. resulting in only a single pass of oversampling per bundle.
you can hear in realtime the oversampling processing without waiting to render.
While I agree it would be nice to render above the current sample rate. i don’t recommend it since you won’t be able to hear the effect until you playback the render. which in my experience comes out too different than the “preview” in the realtime playback. (calling it a preview, since in that case the goal is a higher quality output).