That pope was wrong then because even Mary admitted she needed a Savior. The Bible says, “all have sinned....”
“all have sinned” means every soul is subject to original sin. Children before the age of reason, about 7, can’t sin. Adults who have a severe case of mental retardation can’t sin. The Church believes God spared His Mother from original sin in order to prepare a worthy vessel, a spotless tabernacle to house the Son of God, the New Ark of the Covenant.