Thoughts
It's honestly profound the difference between "nothing can be perfect" and "everything can be better."
Obvious there's an attitude "half-full/half-empty" difference. But there's also logical difference. Saying that something isn't perfect doesn't imply that it can be better.
Edit:
Similarly, the second also implies a qualitative aspect that the first doesn't. It's not a binary, perfect or imperfect, it's about being better.