What's truly "sad" is that it's ok if Google does it. It's apparently not ok when OpenAI, Musk, etc do literally the same thing.

This whole controversy reminds me of that Rhodesian designed shotgun marketed as "Street Sweeper" in the US. Making a tool is one thing. Brandishing its unsafe working end to potential customers in an attempt to impress them, alas, could lead to interesting situations...

Why is that?

Depends.

This is on projects that are not serious. So I will treat it as such.

You should worry if vibe-coders submit patches to the Linux Kernel and they do not understand them.