Eggs

But if I read the plot of a book or movie on Wikipedia, will I be able to judge them? After all, I will know the technical details.

You also need to read about the cast and the composer to get an idea of the voices of the characters, their appearance, and what music accompanies everything.

Well, name me just one game that has a decent plot and where everything is more or less balanced.

Balance is a rather peculiar thing and is the subject of many debates. Not to mention that it is primarily critical for games with a focus on multiplayer mode. And yet, people often enjoyed games with poor balance; a good example of this is the still-popular third installment. So, I won't say anything about balance. As for a good plot, here are a few relatively recent games with a decent storyline: Fran Bow, Undertale, DA:I.