Documentation contains a contradiction about ImmediateMesh use case

**Your Godot version:**
4.3
**Issue description:**
The following sentences seems to contradict each other:

_"Generating complex geometry (several thousand vertices) with this tool is inefficient, even if it's done only once. Instead, it is designed to generate simple geometry that changes every frame."
[...]
"If you only generate a surface once, the ImmediateMesh is just as efficient as any other kind of mesh as the generated mesh is cached and reused."_

**URL to the documentation page:**
https://docs.godotengine.org/en/stable/tutorials/3d/procedural_geometry/immediatemesh.html