This is just silly. Nobody is adding icons to Mon, Tue, Wed. Yeah maybe with LLMs it is even easier to fill up empty icon: optional<string> values without thinking. But extreme of not using icons is even worse than meaningless icons that you can at least get used to differentiating.
Here's an example from Chrome on macos:
https://i.imgur.com/I3d8YdA.png
This would benefit from icons at least on new tab, mute, pin, search, split etc