Obviously it's gotten harder over the years, but PS4 and PS5 jailbreaks do exist so that means there's a vector for dumping games that were only ever distributed digitally (at least ones released up to the point where the jailbreaks got patched, as the stores will refused to serve new content until you update your system).
All that said, I think my main argument with respect to emulation and root access was less about individuals having that access, and more that so long as someone gains that access even through extraordinary measures, the games can be dumped and distributed, at which point true ownership becomes possible (even if it takes a while for them to become playable on emulation or hacked hardware).
There is diminishing importance of ownership as time passes though because there is less and less desire to own such assets as they get older and newer titles come out.
There are exceptions to the rule, but I'd imagine less than 1% of the population cares about owning/emulating PS3 or even PS4 games at this point.
So yes, there is an eventual vector for "ownership" (though illicit, at least in this hypothetical) but I doubt that moves the needle much if at all.
On the other hand, the fact that people have spent enough time to write down which entries have this bug and which don't (and potentially even which stadiums have it and don't in the entries that do have the bug, since it's apparently not consistent across them) does lead credence to the idea that the library is pretty widely distributed.