Right. And so Pop!_OS gives you a decent tiling window manager, with sane defaults, without having to spend hours on customising your configuration. What's more, the tiling they provide is an optional feature. You can enable and disable it at any time without messing with you config for hours.
It had to be hijacked because HJKL are often used for keyboard navigation for people who prefer right-handed home-row navigation. Super+Esc is the shortcut you're looking for.