Sometimes you specifically try to install the non-snap version, and Ubuntu just says "no, you're getting snap". There was a kerfuffle about Ubuntu and chrome a while back.

There is sometimes an "advantage" in being able to user a new version with your OS than you would otherwise, or not needing to try to find/download dependencies.

The downside is that it's slower, they take up more room, they have issues when the program needs to talk to other programs, and that Canonical is creating a weird walled garden.

...also, if you want something similar-ish to snaps, with the same upside and with less downsides, use flat-packs.

...but honestly, just install the actual program.

It's the easiest way to let Canonical fuck you in the ass!

If they don't know much about Linux then they will be duped into using it: Ubuntu guides users towards it.