I enjoy how you come across in your response, thank you. Let me answer in kind.
Hi. I'm having computer trouble so I'm going to see if I can limp through a few answers. Don't make too much of their brevity.
It does not state that scripture is the highest authority.
As I noted, it does.
Most verses in the Bible in reference to scripture are referring to the OT, which the apostles used to show the world that Jesus was the Messiah foretold in the OT.
But since the Church that all of us descend from decided that the NT was also Holy Scripture, you can't take that view unless you disavow the Church.
Scripture does not support the concept of SS.
That's debatable, but it's impossible to add to Scripture without Scriptural justification, and that's lacking.
Scripture supports both scripture and tradition.
The verse that's always cited says to hold to unidentified traditions. So that means we don't know what they are in any case. But the word there means customs. The term
Holy Tradition (spelled differently) is a concept devised by later churchman, was arbitrarily named, and has a totally different meaning.
Tradition does not compete with Scripture. They work together
That's not so. If a doctrine is created on the basis of Holy Tradition it is one that isn't otherwise established by Scripture.
It is the logical conclusion in terms of authority. Because there are so many different denominations, all claiming to be true, all following SS, obviously this means they are all right. But ask a Baptist how the Lutherans interpret scripture and they will say wrongly, and visa-versa.
But this is probably the most unpersuasive argument of all against SS. For one, SS doesn't evaluate interpretions and certainly doesn't deem any possible interpretation to be as good as the next one. It's all about
what to look to when seeking to know the answer to any necessary doctrine.
For another, if it's true that many different SS denominations have different doctrines, what do we say about the suggested alternative? There are a number of different churches that utilize Holy Tradition instead of SS and, guess what? ...no two of them agree on doctrine although they all say they followed Tradition. If the Bible isn't good enough, the suggested remedy is even less so!