Fans outside Chicagoland do not understand. If you perform, are a great person as well, Chicago will literally love you forever. Forever. The 2016 team is a Chicago icon. And possibly Rizzo most of all because of his charitable work for pediatric cancer. God bless Anthony Rizzo.
Every team's fanbase has that player who will always be a part of the fabric of the organization and community no matter where they go or what they do. They don't necessarily have to be the best player. Just someone who gives their all to the team and the community.
Bottom line is he didn't want to be here. Was the Cubs' first offer low? Yes. However, a negotiation only works when BOTH aides bargain with each other. One side bargaining against itself is how they get stuck with Alfonso Soriano years ago.