Chaos in Spain after payment card network crash

Yesterday the payment card network in Spain was down for several hours. I personally was in the supermarket and it was chaos. People with all the products in their baskets were piling up without being able to pay. The same thing happened in restaurants and basically anywhere you had to pay, including online payments. The event probably caused losses to the majority of Spanish businesses, and everything occurred because of the failure in the system of a single company. I am genuinely interested on hearing the point of people who still don't believe that decentralized blockchain networks are the future of payments.