Perfect is in the eyes (or ears, in this case) of the beholder. A song can sound like the best thing you've ever heard, and you could make an entire album out of it, but the pursuit of perfection is futile.

Ask any artist if they've ever released a perfect album, there will not be a "yes". Every artist is keenly aware of their own faults/shortcomings and end up thinking about what tracks they would have done better. You could have someone make music for a thousand years and they'd still think of something else they could have done the next day. And even then, what sounds better to an artist may not sound better to their listeners, so perfection is simply not worth wasting brain space over.