Why is it important in the Marsilius's criticism of the Petrine Siri that the Bible never say is peter even visit Rome?

Marsilius's criticism is based on his belief that the papal authority claimed by the Petrine theory rests on shaky foundations. By pointing out that The Bible does not explicitly mention Peter's visit to Rome, Marsilius challenges the traditional notion that Peter established the papal lineage in Rome. This critique undermines the historical basis for papal supremacy and the authority claimed by the Church.