It depends on your definition of harm. When your product is what's published on the websites and you regularly find ripoffs of said website publishing your ripped off content, maybe you'd feel differently about it.
Not sure what that has to do with scraping. A desktop browser can be used to copy and paste chunks of content and plagiarize a site. We have reasonable copyright protections to protect authors against that. What we need to discharge are the unreasonable laws regarding network access. It's not all or nothing.
fair enough but I don't think that's the main purpose. There are many many cases where you would want to scrape something and often people would probably be encouraged in doing so in a "polite" way if websites didn't make it hard.