The answer is always in Scripture.
Col. 2:8 "Beware lest anyone cheat you through philosophy and empty deceit, according to the tradition of men, according to the basic principles of the world and not according to Christ."
Any sect that believes in Sola Scriptura believes in the equality of the believers.
"Any sect that believes in Sola Scriptura believes in the equality of the believers."
So far as I know, all Christians believe in the basic equality of all believers. That doesn't mean that my interpretation of scripture is as good as the next guy's. In fact, my interpretation is worthless except as a part of The Church and in fulfillment of my role as a layperson in The Church. The equality of all believers is manifested in the availability to all of a definitive exposition of what we are to believe as members of The Church.
*That is demonstrably untrue. Several of the protestant Heresiarchs who promoted the 16th Century Heresy of sola scriptura warred against one Doctrinally and accused one another of trying to Lord it over others.
Luther even commanded his followers to ignore Scripture when it taught what he rejected - good works.
Luther CONSTANTLY denounced those who disagreed with his personal opinions about sola scriptura
You were kidding around when you wrote that, right?