Why does “Stardew Valley” get it totally right, and the rest not get it right at all?

I think it's because Stardew has a lot of RPG elements. Developing relationships with the townspeople (romantic and friendship), figuring out the lore, etc. Lots of games that try to replicate Stardew do the farming / labor stuff and call it quits. I know there are probably some people that go into that game only doing farming, but most people I've met who are fans of it like the lore stuff.