Your comment got me thinking... Is this a big deal, or even a small deal?
I think it's a deal of some proportion. If someone is trying out Linux for the first time and stumbles across how Flatpaks work and starts exploring Flathub, maybe their initial impression will be good enough to consider switching. If something appears to be polished, then maybe it is.
I think the docs recommend (and this is how I have it set up) leaving the go2rtc stream as you have it currently, and changing the stream path for the camera config to
rtsp://127.0.0.1:8554/nursery