In other words: we ruin things for ourselves, just like other enthusiasts in other fields.

Thing is, ignorance IS bliss. The less you know about a subject, the more easy it is to be impressed by something in that subject, so you're more easily satisfied.

People with a wide range of interests, but very little depth in all of them tend to be in general more satisfied than people who have a narrower range, but deeper focus.

The first group listens to the pop music on the radio and think it's good, plays mainstream gaming and think it's all good, watches hollywood blockbusters and love their "originality", basically everything is awesome!

The second group reads all the specialized news outlets on his/her favorite subject, gets advance information on the new products coming out waaay in advance, follows the development process of this product and are, most of the time, disappointed in the end. Sometimes, they're not disappointed, they get exactly what they wanted. Very rarely are they pleasantly surprised, though. And worse: they see the trick behind the magic. If they're a music buff, they'll see songs as a series of chords more easily than as an emotion. If they're a gamer, they'll see mechanics more easily than they can be immersed in the gameworld. See enough movies and you won't get scared, happy or sad as easily because everything becomes a cliché... suddenly you're more impressed by camera angles and costume design (nitpicky things you didn't even notice before) than in being moved by a story, because you've seen how movie clichés work, so they don't move you as much anymore (if at all).

I'm not saying that you should be a shallow airhead (that's not really something you control all that much), just that they are happier. ¯\_(ツ)_/¯