The point folks are making is that Stardew was finished on release, it’s just that the developer has the passion and financial ability to continue to improve it.
If it was 1994, maybe the game would have been released on a cartridge and never changed for myriad reasons (publishing rights, being on physical media, etc).
Example: Super Metroid was one of the best games ever made, and was complete when it was released, but you better believe I’d take free updates that further improve on it. There’s always improvements to make, because nothing can really be perfect. Those hypothetical updates wouldn’t retroactively make it an incomplete game. Maybe it’s too a subtle philosophical point
We could also achieve universal peace if everyone just threw down their weapons, and no one would go hungry if everyone would stop being greedy. Unfortunately, people aren’t rational, and there’s cultural/social constructs that keep these things from happening.
If we want to change them for the better, we unfortunately have to operate within the constraints we’re faced with. We can change those constraints with hard work, but can’t just act as if those constraints don’t exist. It’s the same way folks pretend that being “color blind” re: racial issues will solve things. Would be great, but sadly plenty of folks are incapable of not being racist, and historical harms mean that we can’t just pretend that perception is the only problem.