Two previous Popes, John XXIII and John Paul II, have been canonized. You are supposed to be canonized after extensive scrutiny and two examples of miracles (successful intercession with God) are established. If you are immediately and permanently cured overnight from a terminal illness after praying to a saint, then that is a miracle.
Epicurus would probably say that if praying to a saint cures you, then why not do it. Science and medical documentation do not come into it. You are alive and happy, and you believe what you believe. Others of us would prefer to be treated by medical experts, based on scientifically established principles and a stellar track record. Two cures, immediate and permanent, are not enough for me, speaking personally.
For humans hope dwells eternal. A severely disabled Catholic relative of mine made the (difficult for her) journey to Lourdes to pray for the end of her suffering. She got there; nothing happened, no cure, nothing. But to the end of her days she still believed in Lourdes and prayed accordingly. Well, it gave her peace of mind, even pleasure, and why not? It offered reassurance and hurt nobody.