The essence of Galatians 3:28 is that we are all equal in dignity. It has nothing whatsoever to do with qualifications for service in the Church in any role, ordained or not ordained, as 1 Corinithians 12:5-30 makes clear.

No one has a right to office in the Church.

Even the heavenly kingdom is monarchical, and the very first sin, the core of sin, is disobedience.