What you fail to acknowledge is that Bing Google etcetera have an effective monopoly on search. They can afford to respect robots.txt because everyone wants the

What you fail to acknowledge is that Bing Google etcetera have an effective monopoly on search. They can afford to respect robots.txt because everyone wants them to scrape their site. The first mover advantage is so huge in this case that without allowing scraping, it's hard to understand how anyone could ever compete with these monoliths.