The problem with unorthodox thinkers, as Graham defines them, is that they are often not grounded in expertise. For example, I will take an unorthodox opinion of my own: Neither socialism nor capitalism are great economic systems and we need novel thought on new economic systems that are not based in industrial revolution assumptions.
(Another, to give a guttural rather than intellectual reaction from some: I believe we should change the culture that gender is not presented publicly until the child chooses a gender. They are also given provisional names that are unisex and are allowed to choose their own name at puberty.)
However, I have not spent the years of deep thought to truly develop the arguments. While I have a lot more invested into gender studies than the average human, I am not an expert. Expert goes far further than reading a few books and watching some YouTube videos. The burden on me is far higher than just saying, "this is what I believe" because they are unsubstantiated.
The truth is that if you have a plethora of unorthodox views, it is likely because you have not performed in-depth research to be an expert. You likely do not understand the landscape of the arguments, the historical context and critiques, and the nuances to the argument because understanding all of that can take months of study and interaction with the experts.
That doesn't mean that you need some sort of degree: An unorthodox opinion that is well-substantiated, for example, is Tim Ferriss's examination of psychedelics. He has obviously put in the work and has put money in experts' hands to validate those ideas. This is in stark contrast to the work that many put into their unorthodox opinions.
But ultimately, most people would do better if they acknowledged that their opinions in places outside their expertise are largely shallow.