You accept search in GUI, but don't in man pages? Scrolling through actions in a tree-like menu structure is ok, but through a tree-like structure in the --help output is not? Feels inconsistent.

The whole benefit of text-based interface is that search, filter and transformation is always available and completely independent of the running program.

I can see the visual discoverability aspect for GUIs, but for the visual layout GUIs and TUIs are on par, the difference is rather in the rendering mechanism: pixel vs. character-based.