Level 1 - Learn language.
We learn from our parents, friends, family, schools, churches, TV. Every source of information comes from what we see as an authority because we don't know any better. We adopt the vocabulary of our environment and it shapes our thinking.
Level 2 - Learn Science
Later on, even in a poor education system, we will learn the scientific method. We will learn to look for evidence to support or deny an idea. We start to question what we learnt in Level 1.
Level 3 - Learn Maths
Just when we though it was easy... Evidence == Facts (simple right?), we find that presentation of evidence is just as important. We find out companies/politicians/religions are blatantly using misleading graphs, ignoring facts that don't fit their agendas, or massaging data to fit their own motives.
Level 4 (optional) - We try to learn Psychology/Philosophy/Brain Biology
Dismayed by what learnt in Level 3 we try to gain an understanding of why people are greedy/blind/selfish. Will we ever get a definitive answer? Maybe it is all ego? I would argue it is...
We all know people who have failed to level up in the game of life. I have an old Aunt who thinks that computers are the work of the Devil and only communicates via letters and landlines. She never got past Level 1. We can see these people today, science was too hard to understand so their egos kept them in their comfortable place. Traditions/religion/what the nice man at the political rally said becomes the only learning they need to have. This is where the shouty burn-the-banks minority BTC maxis live.
I have a friend at Level 2. He rejected the religious upbringing and influence of MSM, is swayed by evidence based logic, and believes every conspiracy theory that is produced. 5G, anti-vax, Illuminati, whatever you're selling he's buying it. He never learnt maths at school, it was too hard, I think his ego limits him to stay in his safe place where things make sense. This is where the majority BTC maxis and ETHheads live.
Level 3 is where most Zerpers live. Many of us would have entered the cryptosphere because our interest was piqued by the shouty BTC minorities. We saw them pointing fingers at their perceived enemies and instead of jumping on the bandwagon we took a look at what it was that was actually scaring them and found out... Hey, they have good reason to be scared. We weren't limited by our egos or tribe mentalities.
Level 4? Do we need to get to Level 4? My above examples are people who found science/maths difficult and got trapped by their egos. I personally find Level 4 difficult. Also I find the complexities of international finance and banking difficult. I'm amazed by the people on this forum who are SMEs in these areas and can argue economic theory/central bank policy/regulatory concerns. And here's the point (you knew I had a point, right?) I'm not smart enough to mix it up with those posters in their field of knowledge, but I am smart enough to not let my ego hold me back. I don't have to be the smartest person in the room, I just have to be smart enough to know where the room with the smart people is and listen to what they're saying.
And... there's a lot of smart people on this forum from different fields. The software devs get annoyed at the chartists that complain about the Flare test-net decision. The technology futurists get annoyed at the business folk who criticize every Ripple pivot (or vice versa). The common sense, justice minded posters can't understand the position of the lawyers who know the judicial system follows rules not logic. We have a lot to learn from each other but we will always need to be able to distinguish between intelligent, informed discussion by genuine people, and uneducated, Level 2 FUDers that believe what they read on Fakebook.