We already have precedent that it's entirely legal. Making an argument that individual scraping should be illegal is practically impossible.

Scraping in this context is just accessing a public web resource and rendering it locally. The only difference with a browser is a customized interface.

So to make scrapping illegal they would either make accessing a public web resource illegal (ban the internet) or make formatting the accessed web resource illegal (make it illegal to use any software to view the accessed public web material, including browsers).