All of the above is true, and I would add one more: 5. Legitimate, credentialed experts can be full of shit too. Sometimes they are simply wrong, as being expe

All of the above is true, and I would add one more: 5. Legitimate, credentialed experts can be full of shit too. Sometimes they are simply wrong, as being expert on a given topic does not mean you can correctly answer every single question related to it. Sometimes the expert might be correct about the facts, but wrong about recommendations, because real world policy decision making is complex and difficult, and experts in one thing, as you observe, rarely are experts in many things. Finally, it might also happen, and it sadly does more and more often these days, that the experts are actually deliberately conning you, misrepresenting reality to make you draw wrong conclusions that match better their agenda — experts, after all, are still just human.