The article literally says

All of Nintendo’s first-party Switch 2 games have the full game on the Game Card. That includes the $80 launch title Mario Kart World.

We were talking about Nintendo as a game dev.

They do put the full game on the cartridges, for example I can play TOTK on a new switch with just the cartridge without ever going online.

https://www.gamespot.com/gallery/these-nintendo-switch-2-titles-have-the-full-game-on-the-game-card/2900-6508/

Can’t argue with that!

Their games are genuinely fun though, and they work offline