NOT ALL CREDIT CARDS ARE CREATED EQUAL
Not all credit cards have benefits. Many are just "credit" cards. In the simplest terms, with these cards, the bank advances you money. You are expected to repay what you borrowed at the end of the month. If you don't repay all the money you borrowed, you pay interest on the balance. That's pretty straight forward.
But since there are credit cards out there that not only loan you money but also give you a goodie bag of benefits, why not use those cards? Banks want your business. That means you can have credit and goodies too. And that is a very good thing.