We seem to have a baseline disconnect with respect to how one goes about picking what to invest in, so I'll let the subject drop and not get into line-by-line argument.
However let's take a look at the broader claim "treating finance as hard is a mistake".
It looks to me like there are two sorts of people that consistently do well in personal finance
Um, evidence? It does not look to me like that, so where's the data?
The "finance is impossible" group is better known as passive long-only investors. They don't get "average" return on capital in any meaningful sense of the word "average" -- they are just willing to accept whatever returns the basket of assets (index) they chose will generate. And they still have to make decisions -- very meaningful decisions -- about which index to pick and how much leverage to deploy.
The "finance is easy" group is usually called value investors. Note that they are active investors, not passive. Given this I am not sure why do you think they consistently do well -- this seems to contradict your acceptance of EMH earlier. And, of course, "pricing assets" is very very hard.
It's not clear to me what advice you're giving with the statement "Finance is hard."
The advice is: there are no good one-size-fits-all solutions. Investments should be custom-tailored to individual circumstances which include things like risk tolerance, expected use, expected time horizon, etc. That custom-tailoring is complex and there are no obvious ways to make it simple. Simple solutions exist but are typically sub-optimal. Generic advice (other than "don't fall for scams") is pretty worthless.
Um, evidence? It does not look to me like that, so where's the data?
Who do you think consistently does well, and what data do you use to support that view? That'll help me determine if I have evidence you'll find convincing.
They don't get "average" return on capital in any meaningful sense of the word "average"
Similarly, what does "average" mean to you?
Given this I am not sure why do you think they consistently do well -- this seems to contradict your acceptance of EMH earlier.
...The EMH has holes; Buf
P/S/A: There are single sentences which can create life-changing amounts of difference.