No, I think that games that couldn't be patched were, at the very least, just as good and very likely a lot better than modern games. At the very least, the fact that the game couldn't be patched meant that companies invested in QA and testing. In those days, "going gold" or shipping the master ROM was a
big deal, and so companies went out of their way to ensure that their product didn't have any huge showstopper bugs prior to launch.
In theory, modern games, with patching could be even better. They could be just as well tested as older games, but also ship patches to fix the things that do slip through testing. But in practice nobody does that. Instead, game developers just compress the schedule, knowing full well that they can now ship games with totally breaking bugs that get addressed with multi-gigabyte "day one" patches.