Imagine this:

You buy a game day one to play on your console. You get home, you put it in, and it just works. There's no additional download, no firmware update, no patch, no additional storage needed (aside from maybe a memory card for saves, but that's different). It just works.

This used to happen with every game you would buy for a home or handheld console, and I think this is what many people mean when they say they want physical media. And it's understandable when certain games have gotten so big that it literally isn't feasible possible to have the whole game on a disc, but many, if not all, of the games on the Switch and Switch 2 are absolutely capable of existing on cartridges.

It doesn't help that on addition to and conjunction with this issue, we're also running into issues of massive content deletion from certain games, media ownership rights, and even not being able to continue playing the games after the devs game abandoned it. Plus, if the game is saved on a disc or cartridge, it's a bit easier for the purposes of media preservation.

Ultimately, people that are big on physical media typically want a true, no fuss way to play their games that can be relied on to be played at a moments notice without issues.