To me, professionalism at its core is treating others with dignity and worth. Naming our own biases, and doing our best to recognize and disrupt them is part of this process. No institution is perfect, and no person is perfect. When organizations or people make mistakes, part of professionalism is taking accountable, and taking action to implement avenues for institutional change. Part of professionalism is also transparent communication, especially for those in leadership positions, in order to build trust. These are, in my opinion, just a few pillars of professionalism.
I also appreciate the thoughtfulness on this topic that many peers have already shared on this platform, especially ideas exploring how power dynamics can have an affect on professionalism.