What is there to explain? If you don’t add any savory ingredients to pasta it is not salty or savory in taste.

Same as you can prepare rice savory or sweet as rice pudding or something.
You do know “pasta” just means the noodle, right? It’s still pasta if you don’t add anything?
There are lots of sweet pasta dishes in the world like sweet kugel or milk noodles.

I just add (cold) applesauce onto (warm) noodles and eat it. If I’m fancy, I make applesauce from fresh apples.

Also, look up portugese Aletria. That’s angle hair pasta as it’s best.