This is partly true. Start-Up Chile makes a big effort to bring in speakers and mentors. That being said, Santiago isn't Silicon Valley, and Start-Up Chile doesn't have the network of a YCombinator or TechStars. I'll also say that outside of formal mentoring, there is a lot of value in the community of international entrepreneurs that take part.
But the SUP entrepreneurs are doing really great job, organizing themselves into groups and mentoring each other with a lot of practical results. It's just about creating a truly ecosystem ;)