I don't recall repeating OOA situation in Rescue, but maybe we did.
Anyway....IMHO there are some very important Rescue Course skills that should be in the OW course. Now, I will also say that I also have not had occasion to perform a rescue, though that's not surprising in that the vast majority of my diving has been solo, particularly the last 10 years of my 15 total. I did do a tired diver tow once while assisting an OW course.
The skills that should be included in OW are IMO--
--dealing with a panicked diver on the surface. I recall the total OW training here is to paraphrase "establish positive buoyancy". I may ask what the method(s) are for doing that safely.
--panicked diver at depth.
--unconscious diver at depth -- check him out, bring to surface correctly. I know, he's probably dead, but...
--giving inwater rescue breaths.
--removing equipment and giving breaths while towing (and when to remove it or not).
--dealing with a runaway ascent (or descent). This probably is more common than you'd think, at least from what I read.
--missing diver.
--near drowning.
I do agree in that the chances of actually using this knowledge is very slim (though with enough diving with others, and of course in the case of pros the chances increases a lot I would assume).
I 100% agree that those are all useful skills for a diver to have, which is why I have always (and I think most divers also) strongly recommend the Rescue Diver course. But the purpose of the OW course is not to provide all the skills a diver might possibly need in their diving career. It is designed to give people the skills they need to be safe and competent divers, and to provide a foundation on which to build their diving skills.
Consider a diver who will only go on one or two dive trips a year, and will only dive with a shop that provides DMs in the water and plenty of support on the boat. Is it reasonable that we tell this diver "you can't dive unless you know how to rescue an unconscious diver from depth, provide rescue breaths in-water and perform CPR once you remove the victim from the water!" Why would this "vacation diver" ever need those skills? You might say "well... he might! There could be a one-in-a-million scenario where he is called on to rescue someone like this." But if we insist that our vacation diver take the training to prepare him for the one-in-a-million scenario, he'll likely just skip diving altogether.
People are different. Some people, like us, want to get all the knowledge we can possibly gain about what we're doing (e.g. diving) and then acknowledge there is always more to learn. We want to be overprepared, and that's fine. But it doesn't mean that everyone has to be like us.