Interest rates that are payed on the amount of money I have in my Checking/Savings account are not based on credit.
I'm sorry, in that regard you are correct. The APY or annual percentage yields are based on the prime rate which is set by the Fed. The APY directly correlates with APR or annual percentage rate. Meaning that while yields are low, loan rates are as well. No one is upset at getting a .9 percent rate on an auto loan, but complain that savings accounts don't pay enough.
But that aside, chase isn't leaving Apple Pay, but for chase shareholders it's a bold move to bring mobile pay apps for iPhone to Walmart, Target, CVS, Best Buy and Shell. Currently none of these accept Apple Pay. It's just another option Chase is providing. Not a replacement.