Characters
We can't all, and some of us don't. That's all there is to it.
— Eeyore · Winnie the Pooh

Behind the line May contain spoilers.
Our reading
An editorial interpretation.
A resigned shrug about uneven abilities among a group. The speaker accepts limitation without bitterness, treating it as simple fact rather than complaint. The flat, matter-of-fact tone is what makes the gloom oddly comforting rather than tragic or self-pitying.
Context reviewed