this is totally unsubstantiated and objectively wrong. Lines are set to protect themselves from the only people who have a legitimate shot long term to take money from the books. If they are setting lines to “encourage betting” they arent doing this, and this is the ONLY way a book can put themselves at risk. A inaccurate line represents a massive liability to the small subset of gamblers that actually have a way to beat books over a large sample size (usually math)