You state that the Lourdes shrine has resulted in verifiable cures that have been documented by scientists. Oral Roberts, a Pentecostalist, has also effected cures of this nature, as have other faith healers who are considered Protestant. People are apparently physically healed in Tulsa as well as in Lourdes. Additionally, there are evidently miraculous that have occurred at Catholic oriented places, such as the Veronica Leuken site in Bayside, New York, that have been rejected by the Catholic hierarchy. Hinduism and Buddhism also claim the existences of miracles at various sites in Asia.
The existence of miracles neither proves nor disproves the propositions of Roman Catholicism or Christianity.