You can't fully extract yourself from your cultural environment, exceptional philosophers like him already managed to do that a lot more than commoners but he missed other things, it's to be expected. Reminds me of the people who wrote the first ~~Men's Rights~~ Rights of Man and of the Citizen during the French revolution which was incredible progress and yet they voluntarily ignored women, despite women fighting to be mentioned (like her https://en.m.wikipedia.org/wiki/Olympe_de_Gouges).