Because, as I just told you (above) and have told you many times before, you have said Sola Scriptura cannot be the guide since the churches which claim to follow it are in disagreement about the meaning of parts of it (Scripture), but THIS ALSO IS THE CASE WITH YOUR REPLACEMENT FOR SOLA SCRIPTURA.
You've laid out your reason for dismissing Sola Scriptura but then you advocate for an alternative that fails equally to meet your standard.
I think you make a good point here. Tradition and even an "infallible statement" by a pope or another church leader would still suffer the same fate as Sacred Scripture. Someone has to interpret what is valid tradition, and one would also need to interpret the meaning and significance of infalliable statements. You can go to Catholic websites and find Catholics debating about these topics in just the same manner that Protestants debate Sacred Scripture. So I do not think it is a valid argument to say that Sacred Scripture alone cannot be a valid (or the sole) rule of faith merely because there are diverging interpretations of it.
Personally I think that Sacred Scripture is adequate at least insofar as the essentials of the faith. If a person had a copy of the New Testament and no other resources I think it would be sufficient for him to get saved.
But while I think that Sacred Scripture is adequate for that purpose, I don't think it logically concludes that it is the only infalliable authority. Oral tradition passed down by word of mouth, is also adequate. People were getting saved before the first book of the New Testament was ever written, and for hundreds of years before the printing press and widespread literacy.
I don't think you would disagree that things that our blessed Lord and the apostles communicated, but which are not recorded in Sacred Scripture, are valid rules that Christians should follow. Both you and
@redleghunter seem to doubt that they could or have been effectively transmitted by means other than writing. I think that is why you ask questions like "Please provide a list of the traditions" and so forth. Your objection seems to be that you think that the oral traditions mentioned in 2 Thess could not have have been preserved or passed down through the ages without considerable corruption.
But ultimately these things come down to a matter of faith. I have faith that the traditions have been preserved and not corrupted over time, just as you have faith that the Sacred Scripture has been preserved and not corrupted over time. It is not as if we have the original manuscripts, and it is not as if written documents are incapable of corruption.
It cannot be proved as a matter of scientific fact that Sacred Scripture and/or Sacred Tradition have not been corrputed. You believe that God has preserved Sacred Scripture, and I believe that God has acted within the Catholic Church over time to preserve the tradition as well.