I never knew much about solo scriptura as a part of the reformation or how it is used in other religions. But, I always wondered how someone could be expected to read the Bible and to understand its complete meaning. There are so many customs and traditions of Biblical times that are assumed knowledge. Without the church tradition and interpretation, I would miss a vast majority of the meaning.
You are so right here.
Why do we bless ourselves with the Sign of the Cross?
Why does the priest wash his hands during the Mass?
There are so many things that are connected with ancient Jewish tradition. (Some of which Christ was trying to debunk in this last week's Gospel when he said it is more important about what is on the inside than what the external Jewish traditions might be.)