That's a non-issue. If fingerprinting is your concern, people aren't going to blindly tap through 3-5 "allow ____ access to your device" dialogues before they get the hint. If it is dangerous, then Apple could issue a warning in the notification explicitly telling people that it could compromise their browsing.

WebRTC and WebMs don't compromise security anyways. Apple just reaches into their bag of canned excuses and happened to pull out "security" this time.