A simple visit to the bank sparked a surprisingly heated debate online. After noticing frequent grocery and gas charges coming straight from a customer's checking account, a teller suggested switching to a credit card and paying it off in full each month. That advice opened the door to a bigger question many Americans still wrestle with: Is using a credit card instead of a debit card actually smarter? The Reddit discussion quickly turned into something more pointed. One commenter summed up the stakes cle ...