I really think dystopian euphoric society is gonna happen in the future, restricting peoples self control to only make them happy, ethically its a perfect society but in anybody elses perspective it seems like a prison, i suppose people want free will to find happiness, but happiness being straighforwardly given seems restricting or relieving depending on whom you ask
i think that u should play as long as its fun, no matter if u have 100% completion or not, and stop if u dont have fun anymore, games r meant to be fun and entertaining not a chore that u do till its completed, hope this helps =)