I just looked up the definition of ‘polymath.’ It is a person with a number of different expertise and interests who taps into those different topics to apply to problems, decisions and conversations. It doesn’t mean that mathematics has to be one of the areas of expertise though apparently many of those on whom the term is used did have strong math knowledge.
It is too bad that the word seems so unattainable. Everyone can use multiple topics and various knowledge and, especially, multiple viewpoints to address their world.
We all can do a better job of understanding and ‘fixing’ our own dilemmas when we seek wide ranging knowledge, read and observe subjects, be interested and ask questions beyond the narrow scope of our chosen profession.