Some people prefer using keyboards to navigate.

I'm an i3wm, neovim, zellij user and WoW player. I have so many bindings that I use to navigate or do things, and I've optimized/automated away things that are repetitive to me.

Zellij follows the unix philosophy in my book of being a good multiplexer. Sure, Intellij is also a sort of multiplexer with panes and terminal Windows, but I can't use spotify_player and navigate around it inside Intellij like I can within zellij.

Essentially I like installing a tool for doing one thing well, and then combining tools to make my environment fully usable. It allowed me to super easily swap out tmux for zellij when I found I preferred it, but I can't swap out Intellij's paning system for VScode's if I find I prefer it.