Not all valuable scrapeable data is copyrightable. I also know of a number of sites I've scraped that don't even bother attempting to restrict your access to their data through T&Cs even though its the basis for their site (not that they'd have much of a legal basis for enforcing that, anyway). Ultimately if you're in the business of selling raw data with no value added, the problem is your business model, not scrapers.
Not all valuable scrapeable data is copyrightable.
Sure, but a lot of it is, and even the bits that aren't may be protected by other laws such as database rights depending on your jurisdiction. I think anyone who maintains that you can't stop scrapers as a general principle is possibly a little unwise.