In mathematics, in physics, people are concerned with what you say, not with your certification. But in order to speak about social reality, you must have the proper credentials, particularly if you depart from the accepted framework of thinking. Generally speaking, it seems fair to say that the richer the intellectual substance of a field, the less there is a concern for credentials, and the greater is concern for content.
A professional headshot in front of a bookshelf says you're an intellectual. A professional headshot peeking though a bookshelf says you're probably under a restraining order.
The poor girl liked to be thought clever, but she hated to be thought bookish; she used to read in secret and, though her memory was excellent, to abstain from showy reference. She had a great desire for knowledge, but she really preferred almost any source of information to printed page; she had an immense curiosity about life and was constantly staring and wondering. She carried herself with a great fund of life, and her deepest enjoyment was to feel the continuity between the movements of her own soul and agitations of the world.
The poor girl liked to be thought clever, but she hated to be thought bookish; she used to read in secret and, though her memory was excellent, to abstain from showy reference. She had a great desire for knowledge, but she really preferred almost any source of information to printed page; she had an immense curiosity about life and was constantly staring and wondering. She carried herself with a great fund of life, and her deepest enjoyment was to feel the continuity between the movements of her own soul and agitations of the world.