Scripture, or in other words the written teachings of the Prophets and Apostles, is a static thing. St Paul’s writings aren’t goint to change. Nor is the Mosaic Law.
Tradition is dynamic. We are constantly adding to it. As a result, it evolves. All churches have tradition - even ones that claim they do not. Protestants would correctly point out that age does not mean correct. Just because it was written or done a long time ago does not mean it’s right. They would also point out that repetition doesn’t mean it’s right. A group may have “always done it that way”, but they may have always done it wrong.
Most importantly, we must make sure we do not allow the Faith to evolve. Tradition, by its nature, evolves - even in Orthodox churches. We must be vigilant in making sure the evolution of tradition does not cause an evolutin in the Faith.
I really am not aware of many Protestants who would offer a blanket rejection of anything written by a Christian after the New Testament. One thing to keep in mind is that many Protestants - especially in this country - come from a tradition when the only book available to a household was the Bible. People like my antebellum ancestors in central Georgia simply didn’t have access to a complete anthology of the Apostolic Fathers.
The Holy Tradition is not dynamic. Things like liturgical rubrics are dynamic and do change, but the “the faith once delivered to the saints” (Jude 1:3) does not change and that is what the Holy Tradition is. The Holy Scripture is a derivative of it.