It's a ridiculous attitude and it comes from the (unfortunately) evergreen idea that genre fiction is just cheap entertainment and can't have anything, even remotely, interesting to say about the world etc.

The Last thing of Us IS an action/adventure game in third person where you have to hide from enemies or face them using firearms, and most of these enemies are zombies/infected. This is not an opinion, it's literally a fact. It's also the story of Ellie and Joel traveling together, through a world that is actively trying to kill them, and becoming each other's family. People who are saying otherwise need to get off their pedestal and admit that GASP they've been loving an action videogame where zombies play a pivotal part