They are not excited about ApplePay because it costs them $$. The fraudulent charges are covered by insurance while the new fees come from profit. These banks can't drop fraud coverage so it's extra money from their bottom line. It's simple math. Right now they don't have to sign on cause it's not a big means of payment. That will eventually change and they will have to sign up or go the way of the dodo bird. How many banks are out here that don't handle CC transactions???
As for security. Nothing is fool proof. ApplePay is better than most for NOW. Fraud, identity theft and other cyber crimes are an ongoing battle. What works today is the root cause for failure tomorrow.
I didn't know that banks actually use insurance to cover fraudulent charges, but if Apple Pay results in fewer mass data breaches (or rather, fewer customers affected by such breaches), wouldn't it result in cheaper insurance premiums? They do pay the insurance premiums from profit after all.