What am I missing?

Nothing. You're right. The world is not perfectly flat, it's just mostly flat which is why we experience it that way (most especially thanks to water). It does have topography. Many use the word "level" instead, to try and avoid that issue. Language is imprecise.

The world is oriented level-ly. If that makes any sense to you. The world is planar and has topography on that plane, is another way to try and convey the same. It is also worth noting, that this is the case (demonstrably and experientially) regardless of the true shape of the world.

What I meant specifically, by your quoted statement was only to acknowledge that experiential reality. We don't experience a spherical world, we experience a (largely, and including topographical variance) flat one. This is also the reason that children almost all conceptualize (and draw) the world as a flat plane, before they are indoctrinated into other worldviews (under the guise of science and education).

What am I missing?

Nothing. You're right. The world is not perfectly flat, it's just mostly flat which is why we experience it that way (most especially thanks to water). It has topography. Many use the word "level" instead, to try and avoid that issue. Language is imprecise.

The world is oriented level-ly. If that makes any sense to you. The world is planar and has topography on that plane, is another way to try and convey the same. It is also worth noting, that this is the case (demonstrably and experientially) regardless of the true shape of the world.

What I meant specifically, by your quoted statement was only to acknowledge that experiential reality. We don't experience a spherical world, we experience a (largely, and including topographical variance) flat one. This is also the reason that children almost all conceptualize (and draw) the world as a flat plane, before they are indoctrinated into other worldviews (under the guise of science and education).