Nope. Folk is far more than your narrow interpretation based on your own experience.

This is why whenever someone makes a genuine enquiry or point, you come running out of trap 7 trying to belittle them.

Of course a folk standard can be written. They all were, whether recently by people we can relate to or in the deep dim past and buggered about with by successive generations.

It's a genre. Nothing more and nothing less.

Tsk