Scripture speaks about tradition in a positive way 4 times and in a negative way 11 times. Purgatory is a concept found only in 2 Maccabees, which would not have been "tradition" to Paul since 2 Maccabees was written about 40 B.C. in Alexandria Egypt. The very fact Paul does not teach purgatory and in fact teaches that all debts and decrees against us are cancelled demonstrates Paul would reject the very concept of purgatory or Paul is a liar and a hypocrit.
In your mind I cannot prove Scripture only, and you have a very difficult time establishing the validity of your traditions without appealing to Greek men who for the most part never knew the Apostles and are seperated from the Apostles by hundreds of years. It is like May the God bearer. This was changed by some council from Mary the Christ bearer in what the 5th century? Mary was the Christ bearer since she was the mother of Jesus Christ. And although Jesus claimed to be God once in Scripture no Gospel writer or author of any epistle refers to Jesus as anything but the Son of God or the Son of Man.
The immaculate conception is nothing but mythology as is the assumption, which was declared dogma in 1950. Tradition? Oral tradition can evolve with the telling and there is no way to establish the authenticity of any oral tradition being handed down from any of the Apostles.
You can appeal all you want to traditions of men; but Jesus Christ is the Messiah according to Scripture not according to oral traditions, and any tradition that emphasizes any other person is absolutely and unequivocable man made and can be considered the "traditions of men" and totally ignored.