All that needs to be done is to say to Russia that if you aren't going to give Ukraine free access thru the Kerch Strait, Russia doesn't get free access thru the Bosporus.That should make Putin realize the can of worms he's opening up.
Thats not exactly the same, acknowledging Turkey's right do do so means the countries pushing for this would be relinquishing their rights to the Bosporous as well, in addition to actually having to convince Trukey to do so.
This, at least theoretically, can be limited to Russia because it is denying the right to traverse "national" waters to go from one area of international waters to another and thus should not be able to claim the same right for their ships. Still, I agree it's unlikely to implemented.
